By factoring and finishing the square , C is the right response. x = -5 or x =5
What are factoring and the square method's definitions?There are two ways to resolve quadratic equations: factoring and solving the square. A quadratic equation is factored when it is divided into two linear equations with the same solution. A method for rewriting quadratic equations in the form (x+a)²+b (x +a)² +b is known as "completing the square." This method enables us to change a quadratic expression or equation in the form an x² + b x + c to a (x - h) ² + k²from a provided quadratic expression or equation. This method can be applied to ease the process of solving complex quadratic equations .
The following techniques can be used to graphically solve the quadratic equation using at least two separate approaches:
Technique 1: Factoring
- Step 2: Finish the square
- Technique 3: Quadratic equation
- Step Four: Graphing
16x² - 400 = 0 is the quadratic equation that is provided.
First approach: factoring
The quadratic equation presented can be factored as follows:
16x²- 400 = 0
16(x² - 25) = 0
16(x + 5)(x - 5) = 0
Because of this, x = -5 or x = 5.
completing the square using method two
The square of the given quadratic equation can be completed as follows:
16x² - 400 = 0
16x² = 400
x² = (400/16)
x² = 25
x = ±√25
Because of this, x = -5 or x = 5.
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My rabbit Nibbles lives in a moveable pen and helps to keep the grass short. The pen is rectangular and measures 3m by 2m, as shown in the diagram, where the arrow indicates North. On successive days, the pen is moved 1m East, 2m South, 1m West and 2m North.
What is the total area, in square metres, of the region of grass which Nibbles can nibble?
Answer:
We can break down the total area of grass that Nibbles can nibble into two parts: the original rectangular pen, and the additional grass that Nibbles can reach as the pen is moved.
The area of the original rectangular pen is:
A1 = length x width = 3m x 2m = 6 square meters
To calculate the area of the additional grass, we can visualize the movements of the pen. The pen moves 1 meter to the east, 2 meters to the south, 1 meter to the west, and 2 meters to the north. This creates an irregular pentagon shape, as shown in the diagram below:
```
+-------+
| |
| |
E |
+----+---+ |
| S|
| |
| |
| |
| |
| |
+-----------+
W
```
To calculate the area of this irregular pentagon, we can divide it into two triangles and one rectangle:
- The east and west sides of the pen form a rectangle with dimensions 1m x 2m, for an area of 2 square meters.
- The south side of the pen creates a right triangle with legs of 2m and 1m, for an area of (1/2) x base x height = 1 square meter.
- The north side of the pen creates a right triangle with legs of 2m and 1m, for an area of (1/2) x base x height = 1 square meter.
Therefore, the total area of grass that Nibbles can nibble is:
A = A1 + 2 + 1 + 1 = 10 square meters.
So the answer is 10 square meters.
find the slope of (-7,2) and (-4,1)
Answer:
-1/3
Step-by-step explanation:
Use the formula [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex] to find the slope given the 2 points:
1-2
------
-4-(-7)
-1/3 is your slope
Graph of polygon ABCDE with vertices at negative 3 comma 3, negative 3 comma 6, 1 comma 6, 1 comma 3, negative 1 comma 1. A second polygon A prime B prime C prime D prime E prime with vertices at negative 5 comma 3, negative 5 comma 6, negative 9 comma 6, negative 9 comma 3, negative 7 comma 1.
50 POINTS ASAP Determine the line of reflection.
Reflection across x = −4
Reflection across y = 1
Reflection across the x-axis
Reflection across the y-axis
Answer:
The correct line of reflection that maps the polygon ABCDE to its image polygon A' B' C' D' E' is:
C. Reflection across the x-axis
Explanation:
The given vertices of the original polygon ABCDE are:
A(-3, 3)
B(-3, 6)
C(1, 6)
D(1, 3)
E(-1, 1)
The given vertices of the image polygon A' B' C' D' E' are:
A'(-5, 3)
B'(-5, 6)
C'(-9, 6)
D'(-9, 3)
E'(-7, 1)
Comparing the coordinates of the original polygon ABCDE and its image polygon A' B' C' D' E', we can see that the y-coordinates are negated, while the x-coordinates remain the same. This indicates that the reflection is happening along the x-axis, as it is the line that reverses the y-coordinates while keeping the x-coordinates unchanged.
Therefore, the correct line of reflection is the x-axis, as shown by option C. Reflection across the x-axis.
Double-check this answer i wrote.
Roller Coaster Crew
Ray and Kelsey have summer internships at an engineering firm. As part of their internship, they get to assist in the planning of a brand new roller coaster. For this assignment, you help Ray and Kelsey as they tackle the math behind some simple curves in the coaster's track.
Part A
The first part of Ray and Kelsey's roller coaster is a curved pattern that can be represented by a polynomial function.
Ray and Kelsey are working to graph a third-degree polynomial function that represents the first pattern in the coaster plan. Ray says the third-degree polynomial has four intercepts. Kelsey argues the function can have as many as three zeros only. Is there a way for the both of them to be correct? Explain your answer.
Kelsey has a list of possible functions. Pick one of the g(x) functions below and then describe to Kelsey the key features of g(x), including the end behavior, y-intercept, and zeros.
g(x) = (x + 2)(x − 1)(x − 2)
g(x) = (x + 3)(x + 2)(x − 3)
g(x) = (x + 2)(x − 2)(x − 3)
g(x) = (x + 5)(x + 2)(x − 5)
g(x) = (x + 7)(x + 1)(x − 1)
Create a graph of the polynomial function you selected from Question 2.
Part B
The second part of the new coaster is a parabola.
Ray needs help creating the second part of the coaster. Create a unique parabola in the pattern f(x) = (x − a)(x − b). Describe the direction of the parabola and determine the y-intercept and zeros.
Create a graph of the polynomial function you created in Question 4.
Part C
Now that the curve pieces are determined, use those pieces as sections of a complete coaster. By hand or by using a drawing program, sketch a design of Ray and Kelsey's coaster that includes the shape of the g(x) and f(x) functions that you chose in the Parts A and B. You do not have to include the coordinate plane. You may arrange the functions in any order you choose, but label each section of the graph with the corresponding function for your instructor to view.
Part D
Create an ad campaign to promote Ray and Kelsey's roller coaster. It can be a 15-second advertisement for television or radio, an interview for a magazine or news report, or a song, poem, or slideshow presentation for a company. These are just examples; you are not limited to how you prepare your advertisement, so be creative. Make sure to include a script of what each of you will say if you are preparing an interview or a report. The purpose of this ad is to get everyone excited about the roller coaster.
50 POINTS ASAP Triangle NMO is drawn with vertices N(−5, 2), M(−2, 1), O(−3 , 3). Determine the image vertices of N′M′O′ if the preimage is reflected over x = −2.
N′(5, −2), M′(2, 1), O′(3, 3)
N′(−2, 2), M′(1, 1), O′(0, 3)
N′(1, 2), M′(−2, 1), O′(−1, 3)
N′(−5, −2), M′(−2, −1), O′(−3, −3)
Answer:
To reflect a point over a vertical line x = c, where c is a constant, we can use the formula (2c - x, y).
Given the line of reflection x = -2, and the original points N(-5, 2), M(-2, 1), O(-3, 3), we can apply the formula as follows:
For N(-5, 2):
N' = (2(-2) - (-5), 2) = (1, 2)
For M(-2, 1):
M' = (2(-2) - (-2), 1) = (2, 1)
For O(-3, 3):
O' = (2(-2) - (-3), 3) = (1, 3)
So, the correct image vertices of N'M'O' after reflecting over x = -2 are N'(1, 2), M'(2, 1), O'(1, 3), which corresponds to the option:
N′(1, 2), M′(2, 1), O′(1, 3)
Please double-check to make sure if its right ;D
Robert models the volume of a popcorn box as a right rectangular prism. Its dimensions are
2
2 in by
2
1
2
2
2
1
in by
7
7 in. How many cubic inches of popcorn would it hold when it is full? Round your answer to the nearest tenth if necessary.
The popcorn box can hold 35 cubic inches of popcorn when it is full.
How to calculate the volume of the popcorn box?To find the volume of the popcorn box modeled as a right rectangular prism with dimensions 2 inches by 2.5 inches by 7 inches, you need to multiply the three dimensions together:
Volume = Length × Width × Height
In this case, the dimensions are:
Length = 2 inches; Width = 2.5 inches ; Height = 7 inches
Now, multiply the dimensions:
Volume = 2 × 2.5 × 7
Volume = 5 × 7
Volume = 35 cubic inches
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Hey can anyone solve these questions. Thanks
1. $.50 is what fraction of a dollar? Reduce the fraction to lowest terms.
2. If Sue's batting average is .250, what fraction of her times at bat does she get a hit?
1. $0.5 is 1/2 of a dollar
2. The fraction of her times at a bat that she get a hit is 1/4
What is decimal and fraction?Decimals are the numbers, which consist of two parts namely, a whole number part and a fractional part separated by a decimal point.
For example, 0.4 is 0 + 4/10 = 4/10,/. This means the conversion of 0.4 to fraction is 4/10.
1. The fraction of $0.5 to $1 is calculated as;
representing the fraction by x
x of 1 = 0.5
0.5 = 5/10
therefore
x= 5/10 = 1/2
Therefore the fraction of $1 that gives $0.5 is 1/2
2. converting 0.250 to fraction
= 0 + 250/1000
= 250/1000
= 25/100 = 5/20 = 1/4
therefore the fraction of Sue's hit is 1/4.
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The line plot displays the number of roses purchased per day at a grocery store.
A horizontal line starting at 1 with tick marks every one unit up to 10. The line is labeled Number of Rose Bouquets, and the graph is titled Roses Purchased Per Day. There is one dot above 1 and 2. There are two dots above 8. There are three dots above 6, 7, and 9.
Which of the following is the best measure of variability for the data, and what is its value?
The range is the best measure of variability, and it equals 8.
The range is the best measure of variability, and it equals 2.5.
The IQR is the best measure of variability, and it equals 8.
The IQR is the best measure of variability, and it equals 2.5.
The best measure of variability for the data is A. The range is the best measure of variability, and it equals 8.
How to find the range ?The range is the difference between the highest value and the lowest value in the dataset. In this case, the highest number of rose bouquets is 9, and the lowest is 1. This is the data shown on the line plot.
Range = Highest Value - Lowest Value
Range = 9 - 1
Range = 8
The range is the best measure of variability, and it equals 9. The IQR is used when there are outliers that can affect the data.
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LOOK AT PHOTO
5x+3> 10
The smallest integer value of x that would be a solution in the inequality would be x = 2.
How to find the smallest integer ?To find the smallest integer value of x that satisfies the inequality 5x + 3 ≥ 10, first solve the inequality for x:
Subtract 3 from both sides:
5x ≥ 7
Divide by 5:
x ≥ 7/5
The inequality states that x must be greater than or equal to 7/5, which is equal to 1.4. Since we are looking for the smallest integer value, we should round up to the next integer, which is 2. Therefore, the smallest integer value of x that satisfies the inequality is x = 2.
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PLEASE ANSWER!! WILL GIVE BRAINLIEST
Answer:
the correct answer is option D
a one-hectare forest community is sampled in early august. the sample yields 12 small trees, 4 types of vines, as well as 17 native shrubs that represent 10 species. what can be estimated from the sample for the shrubs in the forest community?
Based on the sample of a one-hectare forest community in early August, an estimate can be made for the total number and diversity of shrub species present in the community.
From the sample of the one-hectare forest community, several estimates can be made for the shrubs in the forest community:
Abundance: The abundance of shrubs in the one-hectare forest community can be estimated by multiplying the number of shrubs in the sample by 10 (the number of species represented by the sample). Therefore, an estimate of the total number of shrubs in the one-hectare forest community would be 17 x 10 = 170 shrubs.
Species richness: The sample contained 10 species of shrubs. This can be used as an estimate of the total number of shrub species in the one-hectare forest community.
Diversity: The diversity of the shrub community in the one-hectare forest can be estimated using the data on species richness and abundance. The most commonly used metric for estimating diversity is the Shannon-Wiener diversity index, which takes into account both the number of species and their relative abundance.
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¿Cuál es la aceleración que adquiere un objeto que tiene una masa de 12 Kg y es empujado con una fuerza de 20N?
The acceleration acquired by the object of mass 12 Kg and is pushed with a force of 12 N, is given by 5/3 m/s².
We know that from the first law of Newton's Law that,
F = m*a
where 'F' is applied force; 'm' is mass of object and 'a' is acceleration.
Let the acceleration acquired by the object be 'A'.
Mass of the object is (m) = 12 Kg
The force applied (F) = 20 N
So from Newton's First Law of Motion we get,
F = m*a
20 = 12*A
A = 20/12
A = 5/3
Hence the acceleration will be 5/3 m/s².
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The question is in another language. The question is in English will be -
''What is the acceleration acquired by an object that has a mass of 12 Kg and is pushed with a force of 20N?''
Please help, will give brainliest
Answer:
1. Mean : 85.6
2. Median : 90
3. Mode : 95
4. Range : 35
Step-by-step explanation:
1. For Mean, you add up all the terms and divide the resulting sum by the number of terms. In this case there were 9 terms that added up to 770, and when you divided that result by 9, the answer was 85.555 repeating. Since the question asks to round to the nearest tenth 85.6 represents the correct mean or average of the class.
2. To find the median, line up all the numbers in order from least to greatest. Like so :
60,75,75,90,90,95,95,95,95
In order to find the median, find the middle term. Since there are 9 terms, the middle term will be the fifth one. In this case, the answer was 90.
3. Mode represents the number that appears the most in a data set. Look at the 9 terms and find the one that appears the most. In this case it is 90.
4. Lastly, to find the range, subtract the lowest value in the data set from the highest one. 95 is the highest and 60 is the lowest. Do [tex]95-60[/tex] and you will get an answer of 35.
Hope this helps!
Answer:
Mean: 85.6
Median: 90
Mode: 95
Range: 35
Step-by-step explanation:
Mean: Add up all the value and divide by the number of values you have.
75 + 95 + 90 + 95 + 60 + 95 + 75 + 95 + 90 = 770
770 / 9 = 85.6
Median: Rearrange in increasing order + look at middle number
60, 75, 75, 90, 90, 95, 95, 95, 95
Mode: Number that shows up the most.
95 shows up 4 times.
Range: Maximum - Minimum.
95 - 60 = 35.
Please help me with these exercises that uses area and surface area
The areas and the surface areas of the figures are calculated below
Calculating the areas and the surface areasThe area of a figure is the amount of space it occupies in a plane, measured in square units.
So, we have
Figure 1
For the first figure, we have
Area = (2a)² - 1/2 * b² * sin(B)
Evaluate
Area = 4a² - b²sin(B)/2
For the second figure, we have
Area = 18 * 10 + 1/2 * 10 * √(4 * 15² + 18²) + 1/2 * 18 * √(4 * 15² + 10²)
Evaluate
Area = 639.53 square units
Figure 2
Here, we have
Area = 2 * 2 * 2.5 + 2 * 1/2 * 3 * √(3² - 2.5²) + 3 * 2
Evaluate
Area = 20.97
Figure 3 (Stairs)
Here, we have
Area = 8 * 4 + 8 * 8 + 8 * 4 + 8 * 8 + 2 * 16 * 4 + 2 * 8 * 4
Evaluate
Area = 384
Figure 3 (Semi-circular)
Here, we have
Area = 4 * 4 * 6 + 6 * 6 + 2 * 1/2 * (22/7 * (6/2)²) + 1/2 * 2 * 22/7 * (6/2) × 6
Evaluate
Area = 216.86
Figure 3 (Cylinder-Hemisphere-Cone)
Here, we have
Area = 2 * 22/7 * (10/2) * 12 + 22/7 * (10/2) * √(8² - 5²) + 2 * 22/7 * (10/2)²
Evaluate
Area = 632.42
Figure 3 (Cylinder-Cylinder)
Here, we have
Area = 2 * 22/7 * 8 * (8 + 3) + 2 * 22/7 * 2 * (2 + 7) - 22/7 * 2²
Evaluate
Area = 653.71
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What is the value of the expression below?
(31½ - 93) ÷ (-2.5)
A - 2.5
B-2.3
C 2.3
D 2.5
Answer: the value of the expression is 24.6, which corresponds to option C.
Step-by-step explanation: In order to assess the expression, we must adhere to the sequence of operations (PEMDAS) and execute the computations in the subsequent manner:
Begin by calculating the expression in the parentheses as a priority: (31.5 squared minus 93) equals negative 61.5.
Next, perform the operation of dividing -61.5 by -2.5 which results in 24.6.
when flipping a coin 4 times. How many favorable outcomes are there for two heads and two tails (in any order)?
There are 6 ways to get two heads and two tails (in any order) when flipping a coin 4 times.
How many favorable outcomes are there for heads and tailsWhen flipping a coin 4 times, there are 2 possible outcomes (heads or tails) for each flip.
Therefore, there are a total of 2^4 = 16 possible outcomes for 4 coin flips.
To find the number of favorable outcomes for getting two heads and two tails (in any order), we can use combinations.
We need to choose 2 coin flips out of 4 to be heads, which can be done in C(4,2) = 6 ways.
Once we have chosen the positions for the heads, the remaining positions must be tails.
So there are 6 ways to get two heads and two tails (in any order) when flipping a coin 4 times.
These outcomes are:
HH-TT
HT-HT
TH-HT
TT-HH
HT-TH
TH-HT
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7z + 7> - 2z -4 solve the following for inequality for z simplest form
Answer:
z > - [tex]\frac{11}{9}[/tex]
Step-by-step explanation:
7z + 7 > - 2z - 4
9z + 7 > -4
9z > - 11
z > - [tex]\frac{11}{9}[/tex]
A national survey of heads of households showed the percentage of those who asked for a raise and the percentage who got one. According to the survey, of the women interviewed, 24% had asked for a raise, and of those women who had asked for a raise, 45% received the raise. If a woman is selected at random from the survey population of women, find the following probabilities.
(a) P(woman asked for a raise) = _____.
(b) P(woman received raise, given she asked for one) = _____.
(c) P(woman asked for raise and received raise) = _____.
Probability
The following probabilities are found under the condition that a certain national survey of heads of households P(woman asked for a promotion) = 24%, P(woman received promotion, given she asked for one) = 45%, P(woman asked for promotion and received raise) = (24% x 45%) = 10.8%
Now,
Regarding a national survey concerning the head od households, only 24% of women interviewed had requested for a promotion and of those women who had asked for a promotion, 45% received the raise.
Therefore,
(a) P(woman asked for a promotion) = 24%
(b) P(woman received promotion, given she asked for one) = 45%
(c) P(woman asked for promotion and received raise) = (24% x 45%) = 10.8%
Probability refers to the percentage of an event taking place in a required time frame, in a specified place. It is considered a great aid in the fields of science and mathematics.
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In Apextown there are 320,000 29-year-olds. Based on the table below, how many are not expected to be alive in a year? • A. 422 • B. 419 • C. 315 • D. 485
The number of 29 year olds who are not expected to be alive in a year would be A. 422 people.
What does the table show about Apextown ?We see that in Apextown, the percentage of people who are expected to be alive in a year, based on their ages, is given.
For those who are 29 years of age, we see that the percentage of people who are expected to be alive in a year would be 99. 868 %. This means that the number of 29 year olds who would not be alive would be:
= Number of 29 years x ( 1 - percentage to be alive)
= 320, 000 x ( 1 - 99. 868 % )
= 320, 000 x 0. 00132
= 422. 4
= 422 people
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what is your interpretation of the slope?a.on average, for every additional year of age, bone density loss increases by approx 0.41.b.on average, for every additional one point of bone density loss, age increases by approx 0.41.c.on average, for every additional year of age, bone density loss increases by approx 6.9.d.none of the above
The interpretation of the slope is On average, for every additional year of age, bone density loss increases by approximately 0.41. (option a)
To calculate the least squares regression line, the data points are first plotted on a scatter plot. The line of best fit is then drawn through the data points such that the sum of the squared distances between the line and the data points is minimized. The slope of this line can be calculated using the following formula:
slope = (nΣ(xy) - ΣxΣy) / (nΣ(x²) - (Σx)²)
where n is the number of data points, Σ represents the sum of the values, x represents age, y represents bone density loss, and xy represents the product of x and y.
Using this formula, the slope for this data set can be calculated to be approximately 0.41. This means that, on average, for every additional year of age, bone density loss increases by approximately 0.41. In other words, the slope indicates a positive relationship between age and bone density loss, with bone density loss increasing as age increases.
Therefore, the correct answer is (a) On average, for every additional year of age, bone density loss increases by approximately 0.41.
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Complete Question:
Osteoporosis is a condition in which bone density decreases, often resulting in broken bones. Bone density usually peaks at age 30 and decreases thereafter. To understand more about the condition, a random sample of women aged 50 and over were recruited. Each woman's bone loss was recorded and the date is shown in this file. Create a scatter plot of these two variables, with age as the x variable and bone density loss as the y variable. Calculate the least squares regression line. What is your interpretation of the slope?
a. On average, for every additional year of age, bone density loss increases by approx 0.41.
b. On average, for every additional one point of bone density loss, age increases by approx 0.41.
c. On average, for every additional year of age, bone density loss increases by approx 6.9.
d. none of the above
given the following scenario, would you use the wilcoxon rank sum or the mann whitney test? determining if there is a difference in ratings in maintenance quality at two tirezone locations. forty customers were randomly selected from the location on 13th street, and forty five customers were randomly selected from the newberry road location. group of answer choices wilcoxon rank sum test mann whitney test
The appropriate statistical test for comparing the difference in maintenance quality ratings at two tirezone locations, where there are two independent groups of customers, would be the Mann-Whitney test or Wilcoxon rank-sum test.
The Mann-Whitney test would be appropriate for this scenario because it is used to compare the difference between two independent groups. In this case, we have two independent groups of customers from different locations, and we want to determine if there is a significant difference in their ratings of maintenance quality.
The test compares the ranks of the observations in the two groups and uses that information to determine if there is a significant difference between them. The Wilcoxon rank-sum test, also known as the Mann-Whitney U test, is another name for the same test.
Therefore, the Mann-Whitney test or Wilcoxon rank-sum test is the appropriate statistical test to use in this scenario.
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y=400(0.99)x growth or decay
The given function of the growth decay is decreasing.
What in mathematics is an exponential?
The formula for an exponential function, often known as an exponential function, is f (x) = axe, where "x" is a variable and "a" is a constant that serves as the function's basis and must be greater than 0.The transcendental number, abbreviated e, which is roughly equivalent to 2.71828, is the most often used exponential function basis.
We have given that,
Y=400(.99)^x
Exponential growth is a process that increases quantity over time. decreases over time, and is said to be undergoing exponential decay instead.
Therefore, The given function of the growth decay is decreasing.
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In ΔDEF, the measure of ∠F=90°, EF = 2. 3 feet, and FD = 2. 9 feet. Find the measure of ∠D to the nearest tenth of a degree
In ΔDEF, the measure of angle D = 38.4°
Here in triangle DEF the measure of angle F = 90°
This means that ΔDEF is a right triangle and DE is the hypotenuse.
We need to find the measure of angle D.
Consider the tangent of angle D.
tan(D) = opposite side/ adjacent side
tan(D) = EF / FD
Here, EF = 2.3 feet, and FD = 2.9 feet.
So above equation becomes,
tan(D) = 2.3 / 2.9
tan(D) = 0.79310
D = arctan(0.7931)
D = 38.42°
Therefore, the measure of ∠D = 38.4°
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Find the equation of the line shown ?
Answer:
y=2x+3
Step-by-step explanation:
find x
look for points (2,7), (3,9), (0,3)
(x2-x1), (y2-y1)
x - distance from 7 and 9: (9-7=2)
y - distance from 2 and 3: (3-2=1)
Rise(y) over run (x) = 2/1=2
so X=2
y=2x
Because we see the line passes the point (0,3) we know the b in y=mx+b = 3
To prove:
try a point
(2,7)
y=mx+b (plug-in)
7=2(x)+3 (isolate x, subtract 3 to 7)
4= 2x (isolate x, divide by 2)
x=2
2=2 ( compare x to original coordinate: (2,7))
Five strains of the Staphylococcus aureus bacteria were grown at 35 degrees Celsius for either 24 hours or 48 hours. Here are the resulting bacterial counts for each condition. The value of the correlation between bacterial count after 24 hours and bacterial count after 48 hours
The bacterial count after 48 hours decreases. A correlation coefficient of 0 would indicate no relationship between the two variables.
To find the correlation between the bacterial count after 24 hours and 48 hours, we would need the actual numerical values of the bacterial counts for each strain. Without that information, we cannot calculate the correlation coefficient. However, it is important to note that a positive correlation would indicate that as the bacterial count after 24 hours increases, the bacterial count after 48 hours also increases. A negative correlation would indicate that as the bacterial count after 24 hours increases, the bacterial count after 48 hours decreases. A correlation coefficient of 0 would indicate no relationship between the two variables.
The complete question is-
Five strains of the Staphylococcus aureus bacteria were grown for 24 hours either at 35 degrees Celsius or at 43 degrees Celsius. Here are the resulting bacterial counts for each condition:
24 hr: 66, 71, 93, 102, 62
48hr: 110,123,146,136,113
If we had plotted bacterial count at 35 degrees Celsius on the y-axis instead of the x-axis, the value of the correlation coefficient would be
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Find the slope of the line through the pair of points. D(3, 5), J(8, 7)
20 POINTS
Answer:
2/5
Step-by-step explanation:
slope= y2-y1 / x2-x1
in this case:
y2=7 y1=5 x2= 8 x1=3
plug that into the formula above to get the answer
slope= 2/5 or 0.4
The rear windshield wiper blade on a car has a length of 8 inches. The blade is mounted on a 16 inch arm, 8
inches from the pivot point. If the wiper turns through an angle of 130 degrees, how much area is swept
clean?
blade
square inches.
The area swept clean by the wiper blade is approximately 239.3 square inches.
To find the area swept clean by the bladeWe need to find the area of the circular sector that is swept out by the blade as it rotates through an angle of 130 degrees. The radius of the circular sector is the length of the wiper arm, which is 16 inches.
The formula for the area of a circular sector is
A = (θ/360) × πr^2
Where
θ is the central angle of the sector (in degrees)r is the radius of the circle π is the constant pi (approximately 3.14)In this case, θ = 130 degrees and r = 16 inches, so we can plug these values into the formula to get:
A = (130/360) × 3.14 × (16)^2
Simplifying this expression, we get:
A ≈ 239.3 square inches
Therefore, the area swept clean by the wiper blade is approximately 239.3 square inches.
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Draw a coordinate plane. Plot the points: A(3, 4), B(2, 2), C(5, 8), D(7, 12), and E(9, 14). All but one of the points are on the same line. Which one is not?
The point that is not on the same line as the others is E(9, 14).
How to find the point ?The point that is not on the same line as the others would not have the same slope as the others.
Slope between A ( 3, 4) and B (2, 2):
= (4 - 2) / (3 - 2) = 2 / 1
= 2
Slope between B (2 , 2) and C (5, 8):
= ( 8 - 2 ) / (5 - 2)
= 6 / 3
= 2
Slope between C ( 5, 8) and D(7, 12):
= (12 - 8) / (7 - 5)
= 4 / 2
= 2
Slope between D ( 7, 12) and E ( 9, 14):
= ( 14 - 12) / (9 - 7)
= 2 / 2
= 1
We can therefore see that E ( 9, 14) is the odd one out and is not on the same line.
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I need some help please
Step-by-step explanation:
'3' is greater than 0 so we use the second portion of f(x)
f(3) = x+1
= 3 + 1 = 4
about how much money
The cost of the car with 60,000 miles would be = $13,000 approximately.
How to determine the cost of cars according to mileage?To calculate the cost of the car form the given graph above is to draw a straight line that connects most of the points of interception.
From the graph, the most appropriate point of interception would be on $13,000 since each line in y-axis represents a thousand dollars.
Therefore, the cost of the car with 60,000 miles would be = $13,000 approximately.
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