Step-by-step explanation:
Examples of like terms in math are x, 4x, -2x, and 7x. These are like terms because they all contain the same variable, x. The terms 8y2, y2, and -2y2 are like terms as well. These all contain the same variable, y, raised to the second power.
This data set shows the scores that each of the students in a class earned on a quiz.
87, 88, 89, 90, 90, 90, 92, 92, 93, 94, 95, 96, 96, 97, 98, 98, 98, 99, 99, 99, 100, 100, 100, 100
Identify the measure that is most likely considered best to describe the variability in the quiz scores.
Select from the drop-down menus to correctly complete the statement.
Since there appear to be
Choose.
in the data set, and since the
Choose.
is close to the median, the
Choose.
can be considered best to describe the variability in the quiz scores
Since there appear to be no outlier in the data set, and since the mean is close to the median, the range can be considered best to describe the variability in the quiz scores
How to determine the measure of variabilityThe dataset is given as
87, 88, 89, 90, 90, 90, 92, 92, 93, 94, 95, 96, 96, 97, 98, 98, 98, 99, 99, 99, 100, 100, 100, 100
There are no outliers in the dataset
This means that the measure of variability to use is the range
Also, it means that the median and the mean are close to one another
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8 A party supply store buys balloons and fills them with helium. The total cost of the
balloon and the helium is $0.50. The balloons are then marked up by 80% and sold to
customers. How much does the customer pay for a filled balloon?
The customer pays $0.72 for a filled balloon.
How to calculate the cost of the balloonLet's denote the cost of the balloon and the helium as x.
According to the problem statement, we know that:
x + 80% of x = $0.50
We can simplify this equation by multiplying both sides by 1.8, which is the same as multiplying the right-hand side by 180%:
1.8x + 1.44x = $0.90
2.24x = $0.90
Dividing both sides by 2.24, we get:
x = $0.40
So the cost of the balloon and helium is $0.40.
The price that the customer pays for the balloon is the cost plus the markup, which is 80% of the cost:
Price = Cost + Markup
Price = $0.40 + 80% of $0.40
Price = $0.40 + $0.32
Price = $0.72
Therefore, the customer pays $0.72 for a filled balloon.
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Answer:
$0.90
Step-by-step explanation:
100%= $0.50
100%+80%= 180%
1%= $0.50/100
= $0.005
180%= $0.005*180
= $0.90
Johnny has 24 pairs of shoes which is 4 less than two thirds the amount of shoes Ralph has. How many pairs of shoes Ralph have?
Answer: Really?
Step-by-step explanation:
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Use familiar figures to find the area of the figure shown. Show all work.
Answer: 10in
Step-by-step explanation: It's been awhile since I have done a problem like this but what you would do first is LxHxW of coarse. I believe you would multiply 5x2=10 3x10=30 30+10=40 40 divided by 4= 10. I'm sorry if it's wrong like I said it's been awhile.
Need help ASAP!! Struggling with these word problems... D:
You invest in AAA-rated bonds, A-rated bonds, and B-rated bonds. The average yields are 4.5% on AAA bonds, 5% on A bonds, and 9% on B bonds. You invest twice as much in B bonds as in A bonds. Let x, y, and z represent the amounts invested in AAA, A, and B bonds, respectively.
x + y + z = (total investment)
0.045x + 0.05y + 0.09z = (annual return)
2y − z = 0
Use the inverse of the coefficient matrix of this system to find the amount invested in each type of bond for the given total investment and annual return. (Round your answers to the nearest cent.)
Total Investment Annual Return
$10,300 $620
The amount invested in AAA - bonds is $5353, amount invested in
A - bonds is $1681 and amount invested in B - bonds is $3369. The solution has been obtained by using matrices.
What are matrices?
The term "matrix of order m by n," sometimes known as "m × n matrix," refers to a rectangular array of m × n numbers (real or complex), organised into m rows and n columns.
Such a range is bounded by [ ] or ( ).
We are given equations as
x + y + z = $10300
0.045x + 0.05y + 0.09z = $620
2y − z = 0
From this, we get the matrix as
[tex]\left[\begin{array}{ccc}1&1&1\\0.045&0.05&0.09\\0&2&-1\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] = \left[\begin{array}{ccc}10300\\620\\0\end{array}\right][/tex]
This shows that AX = B
X = A⁻¹B
[tex]\left[\begin{array}{ccc}x\\y\\z\end{array}\right][/tex] [tex]= \left[\begin{array}{ccc}2.42&-31.57&-0.42\\-0.47&10.52&0.47\\-0.94&21.05&-0.05\end{array}\right][/tex] [tex]\left[\begin{array}{ccc}10300\\620\\0\end{array}\right][/tex]
On solving this, we get
[tex]\left[\begin{array}{ccc}x\\y\\z\end{array}\right][/tex] [tex]=\left[\begin{array}{ccc}5353\\1681\\3369\end{array}\right][/tex]
Hence, the amount invested in AAA - bonds is $5353, amount invested in A - bonds is $1681 and amount invested in B - bonds is $3369.
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How to convert 112 kg to lbs?
The required value of 112 kilograms into pounds using standard conversion relation is equal to 112 kilograms = ( 246. 92 ) pounds ( round up to two decimal places )
Units pounds and kilograms are used to measure the mass of a given things.One kilograms is equal to 2.20462 pounds.
We need to convert 112 kilograms into pounds :
This implies :
⇒ 112 kilograms = ( 112 × 2.20462 ) pounds
⇒ 112 kilograms = ( 246.91744 ) pounds
⇒ 112 kilograms = ( 246. 92 ) pounds ( round up to two decimal places )
Therefore, the converting value of kilogram to pounds is given by :
112 kilograms = ( 246. 92 ) pounds ( round up to two decimal places ) .
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The side lengths 5, 12, and 13 are called a Pythagorean Triple. What is so special about these three side lengths
The 13 has a "3" in it.
This triple is special because it contains two prime numbers.
The longest side is just one unit longer than the middle side.
They are positive integers that form a right triangle.
Answer:
D
Step-by-step explanation:
Only way you apply Pythagoras is if the triangle is a right triangle. it won't work anyway else
A transformation is applied to create a new figure. Which transformation does not preserve congruence?
A reflection across the x-axis
A translation 4 units up
A dilation by a scale factor of 5
A rotation 90° counter clockwise
Option C. The transformation that does not preserve congruence is a dilation by a scale factor of 5.
Congruence is the property of having the same size and shape. In geometry, transformations are operations that change the position, size, or orientation of a figure. Some transformations, such as reflections, translations, and rotations, preserve congruence, meaning that the resulting figure is congruent to the original figure. Other transformations, such as dilations, do not preserve congruence, meaning that the resulting figure is not congruent to the original figure.
A dilation is a transformation that changes the size of a figure by stretching or compressing it. A dilation by a scale factor of 5 means that every point of the figure is multiplied by 5 with respect to a fixed point called the center of dilation. The resulting figure is similar to the original figure, but not necessarily congruent.
On the other hand, reflections, translations, and rotations preserve congruence. A reflection across the x-axis reflects the figure across the x-axis while preserving its shape and size. A translation 4 units up moves the figure up without changing its shape or size. A rotation 90° counter-clockwise rotates the figure 90 degrees counter-clockwise while preserving its shape and size.
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A transformation is applied to create a new figure. Which transformation does not preserve congruence?
A. A reflection across the x-axis
B. A translation 4 units up
C. A dilation by a scale factor of 5
D. A rotation 90° counter clockwise
How to convert 115 f to c?
The required converted value of the temperature Fahrenheit to Celsius for the value 115°F is given by 46.1111°C .
Fahrenheit and Celsius both are the units used to measure the temperature.
To convert Fahrenheit to Celsius use the following formula we have:
( F − 32 ) × ( 5 / 9 ) = °C
Substitute the 115 Fahrenheit to convert into Celsius we get,
= ( 115°F − 32 ) × ( 5 / 9 )
= ( 83 ) × ( 5 / 9 )
= ( 415 / 9 )°C
= 46.1111 °C
Therefore, the converted unit of Fahrenheit to Celsius using standard relation between the two is equal to 46.1111°C .
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Compare the rate of change of the two graphs shown.
The function for graph (1 or 2) has a higher rate of change than the function of graph (1 or 2).
.
Answer: The function of graph 2 has a higher rate of change than the function of graph 2
Step-by-step explanation:
Estimate the product by rounding
each number to the nearest ten. Then
find the product.
68 × 321
Estimate:
Actual product:
Answer:
Estimate: 22,400
Actual Product: 21,828
Step-by-step explanation:
To estimate the product of 68 and 321 by rounding to the nearest ten, you can round 68 to 70 and round 321 to 320. Then you can find the product of 70 and 320:
70 × 320 = 22,400
This is an estimate of the actual product.
To find the actual product, you can multiply 68 and 321:
68 × 321 = 21,828
Therefore, the estimate is 22,400 and the actual product is 21,828.
What is the conversion of 300 lbs to kg ?
The conversion of 300 lbs to kg is 136.054 kg.
What are Measurements?Measurement is the method of comparing the properties of a quantity or object using a standard quantity.
Measurement is essential to determine the quantity of any object.
Given,
Total units = 300 lbs
We have the conversion factor that,
1 kilogram = 2.205 pounds
Or,
2.205 pounds = 1 kilogram
1 pounds = 1 / 2.205 kg
lbs is same as pounds.
300 lbs = 300 × (1 / 2.205) kg
= 136.054 kg
Hence the measurement of conversion of 300 lbs is 136.054 kg.
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How do you know if a quadratic equation can be solved by factoring?
A quadratic equation can be solved by factoring if its coefficients are rational numbers and its discriminant, which is the expression under the square root in the quadratic formula, is a perfect square.
To determine if a quadratic equation can be solved by factoring, you must first ensure that its coefficients are rational numbers, meaning that they can be expressed as a ratio of two integers. Once you have confirmed this, you can calculate the discriminant of the quadratic equation, which is the expression b²-4ac, where a, b, and c are the coefficients of the quadratic equation in standard form.
If the discriminant is a perfect square, then the quadratic equation can be solved by factoring. If the discriminant is not a perfect square, then the quadratic equation cannot be solved by factoring using rational numbers, but may still be solvable using other methods, such as completing the square or the quadratic formula.
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Evaluate the expression (12)2•(3•5−3)+13
The Evaluate the expression (12)2•(3•5−3)+13 is [tex]{7\frac{1}{2}[/tex]
Multiply the numerator by the reciprocal of the denominator:
[tex]5(\frac{3}{2} )[/tex]
Multiply [tex]5(\frac{3}{2} )[/tex]:
Combine [tex]5[/tex] and [tex]\frac{3}{2}[/tex]:
[tex]\frac{5⋅3}{2}[/tex]
Multiply [tex]5[/tex] by [tex]3[/tex]:
[tex]\frac{15}{2}[/tex]
The result can be shown in multiple forms.
Exact Form:
[tex]\frac{15}{2}[/tex]
Decimal Form:
[tex]7.5[/tex]
Mixed Number Form:
[tex]{7\frac{1}{2}[/tex]
Hence, The Evaluate the expression (12)2•(3•5−3)+13 is [tex]{7\frac{1}{2}[/tex]
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Answer:
Step-by-step explanation:
66666
Which get the tens digit of x. Ex: If x = 693, which yields 9?
a. x % 10
b. x % 100
c. (x / 10) % 10
The correct answer is (c) x's tens digit. , if x = 693, that yield 9 is (x / 10) % 10
Here's how we have to evaluate the expression:
Substitute x = 693 into the expression to get:
(693 / 10) % 10
Perform the division first:
693 / 10 = 69 with a remainder of 3.
Substitute the result of the division into the expression:
(69 % 10)
To Evaluate the remainder use the modulo operator (%):
69 % 10 = 9
The result, 9, is the tens digit of 693.
=(x / 10) % 10.
The tens digit of a number refers to the digit in the second place from the right, or the digit that represents the multiple of 10. For example, in the number 365, the tens digit is 6 because it represents 6 tens or 60.
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**NEED HELP. OFFERING 25 POINTS!!**
Graph and analyze the function f(x)=-|x+1|+2.
A.) Use the graph provided below to graph f(x). Include at least 5 points and the vertex.
B.) Describe the transformation from the parent function y=|x| to the function f(x).
C.) State the domain and range of f(x). Use either set notation or interval notation.
D.) State the vertex. Write as an ordered pair.
Providing a graph below. Thanks!
A) note that the above graph is attached accordingly including at least 5 points and the vertex.
(-4, -3)
(-3, 0)
(-2, 1)
(-1, 2)
(0, 1)
(1, 0)
B) The function f(x) is a reflection of the parent function y=|x| over the vertical axis, shifted one unit to the left and two units up.
C) The domain of f(x) is all real numbers since the absolute value of any real number is always non-negative.
The range of f(x) is from negative infinity up to (but not including) 2, since the highest value f(x) can attain is 2 due to the vertical shift of the function, and it can take on any value less than 2 (down to negative infinity) due to the reflection and vertical stretching of the absolute value function. In interval notation, the range can be expressed as (-∞, 2).
D) The vertex of the function f(x)=-|x+1|+2 is (-1, 2)
What is a domain?
A domain is the set of all possible input values for a function. It specifies the range of values over which the function is defined.
Vertex is the point on the graph of a parabolic function that represents either the maximum or minimum value of the function. It is also known as the "turning point" of the function.
A Parent function is basic or "template" function that represents a particular type or family of functions. It can be transformed to create various related functions.
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PLEASE HELP URGENTLY
John wants to save money on fuel. His friend tells him: You can save 1/3 of the cost of your fuel by driving efficiently. John spends £72 each week on fuel for his car. He thinks driving efficiently can save him £100 every 4 weeks. Is John correct? Show why you think this us.
Find the length of side x in simplest radical form with a rational denominator.
The length of side {x} in simplest radical form with a rational denominator is 2√6.
What is Pythagoras theorem?According to the Pythagoras theorem, we can write -
the square of the hypotenuse is equal to the sum of the squares of the other two sides.Mathematically, we can write -(hypotenuse)² = (base)² + (perpendicular)²
(h)² = (b)² + (p)²
Given is the right - angled triangle.
We can write using the Pythagoras theorem as -
x² = √12² + √12²
x² = 12 + 12
x² = 24
x = √2 x 2 x 2 x 3
x = 2√6
Therefore, the length of side {x} in simplest radical form with a rational denominator is 2√6.
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Find an equivalent ratio in simplest terms: 56:88
Answer:
7:11
Step-by-step explanation:
The ratio is 56:88
We simplify by 8 and get the ratio
7:11
We can't simplify anymore, so the answer is 7:11
What is the conversion of 163 lbs to kg ?
The conversion of mass unit lbs, 163 lbs to other mass unit kilogram is equals to the 73.93555631 kg.
Kilogram (kg) and pound (lbs) are used to measure the mass of the substance/objects. Kilogram is used for mass in the International System of Units, whereas pound is used in the imperial and US customary systems. To convert lbs to kg, multiply the particular lbs value by 0.45359237 kg. For example, to convert x lbs to kilogram, multiply the x lbs by 0.45359237 kg. So,x lbs = x × 0.45359237 kg
x lbs = 0.45359237x kg, if x = 6
Therefore, 6 lbs is approximately equal to 2.72155422 kg. It is very important skill to convert the lbs to kilograms in mass measurment. Now, we have 163 lbs. We know that one lbs = 0.45359237 kg
Therefore, 163 lbs = 163 x 0.45359237 kg
163 lbs = 73.93555631 kg.
Hence, 163 lbs is equal to 73.93555631 kg.
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Find the volume of a rectangular pyramid with the length and width 4in and 5in and the height of 6in
Answer:
V = [tex]40in^{3}[/tex]
Step-by-step explanation:
V = [tex]\frac{lwh}{3}[/tex]= [tex]\frac{5*4*6}{3}[/tex]= [tex]40in^{3}[/tex]
Given the functions f(x) and g(x) below, find all solutions to the equation
f(x) = g(x) to the nearest hundredth.
f(x) = 0.15x³ 2x² + 7x - 3.3
g(x) = 1.5|x - 7.3
The solutions to the equation f(x) = g(x) to the nearest hundredth are: x = -8.85, -5.1 and x = 0.6
What is the solution of the function?
To find the solutions to the equation f(x) = g(x), we need to solve for x such that:
0.15x³ + 2x² + 7x - 3.3 = 1.5x - 7.3
We can simplify this equation by bringing all the terms to one side:
0.15x³ + 2x² + 5.5x - 4 = 0
To find the solutions to the nearest hundredth, we can use a graphing calculator or software to graph the functions f(x) and g(x) and find their points of intersection.
Using a graphing calculator , we can plot the two functions and find that they intersect at two points;
approximately x = -8.85, -5.1 and x = 0.6
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Point P divides segment AB in the ratio AP:PB = 3:10. Where is point P located?
P is located at the point (31/13, 44/13).
How to determine?
Let A and B be two points on a line segment, and let P be the point that divides AB in the ratio 3:10. We can find the coordinates of P as follows:
Suppose that the coordinates of A are (x1, y1) and the coordinates of B are (x2, y2). Then the coordinates of P can be found using the following formula:
P = ( (10 * x1 + 3 * x2) / (10 + 3), (10 * y1 + 3 * y2) / (10 + 3) )
In other words, we add 10 parts of x-coordinates of A to 3 parts of x-coordinates of B, and divide by the sum of the parts (10 + 3 = 13) to get the x-coordinate of P. Similarly, we add 10 parts of y-coordinates of A to 3 parts of y-coordinates of B, and divide by the sum of the parts (10 + 3 = 13) to get the y-coordinate of P.
So if we know the coordinates of A and B, we can plug them into the formula above to find the coordinates of P.
For example, suppose that A has coordinates (1, 2) and B has coordinates (7, 8). Then the coordinates of P can be found as follows:
P = ( (10 * 1 + 3 * 7) / (10 + 3), (10 * 2 + 3 * 8) / (10 + 3) )
= ( (10 + 21) / 13, (20 + 24) / 13 )
= (31/13, 44/13)
Therefore, P is located at the point (31/13, 44/13).
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I need some help with this I don't really understand this.
Answer: 31.5
Step-by-step explanation:
6*4=24 (Shaded Rectangle)
3*5=15 15/2=7.5 (Shaded Triangle)
7.5 + 24 = 31.5
Find the sum: 1/10 + 5/100
A: 15/100
B: 15/10
C:6/100
D:15/110
15/100
1/10+5/100
step1: di LCM si nye denominator si nye 100..emegbe zã denominator la nàtsɔ ama LCM la ..le ema megbe la, èdzinɛ ɖe edzi kple numerator
10+5/100
afɔɖeɖe 2: ƒo xexlẽdzesifianu la nu ƒu
15/100
ale,1/10+4/100 ƒe ƒuƒoƒo nye 15/100
Define Moore’s law. How Moore’s law is associated with exponential function.
Moore's law is an observation made by Gordon Moore, co-founder of Intel Corporation, in 1965. It states that the number of transistors on a microchip doubles approximately every two years, while the cost of the chip is halved. Essentially, this means that computing power increases exponentially over time.
Moore's law is associated with exponential functions because it describes a situation in which a quantity (the number of transistors) grows at a rate proportional to its size, resulting in exponential growth. Exponential functions are often used to model phenomena in science, engineering, and other fields that exhibit this kind of behavior. In the case of Moore's law, the rate of growth is approximately 41% per year, or a doubling every 1.5 to 2 years. The formula for exponential growth is:
y = a * (1 + r)^tWhere:
y = the final amounta = the initial amountr = the annual growth ratet = the number of yearsMoore's law can be expressed using this formula as:
N = N0 * 2^(t / T)Where:
N = the number of transistorsN0 = the initial number of transistorst = the time elapsed since the initial observationT = the doubling time (approximately 2 years)For example, if a microchip had 1,000 transistors in 2000, according to Moore's law it would have 2,000 in 2002, 4,000 in 2004, 8,000 in 2006, and so on. The exponential function describes the growth of the number of transistors over time, and the formula allows us to predict future values based on past observations.
~ Zeph
Wade and Riley ride their bikes to school each morning.they want to compare who takes the longest time to ride their bike to school through the week. Is the data numerical or categorical
As they want to compare who takes the longest time to ride their bike to school, such data will be considered as numerical because it involves quantitative measurements (time taken to ride a bike) and can be represented by numbers.
What should we understand about numerical data?Numerical data, also known as quantitative data, is information that is typically presented in the form of numbers and does not include any language or descriptive information. It's always measurable and can be added up.
We can perform mathematical and arithmetic operations on this type of data, and it can be expressed in decimal or fraction form. It can be useful in presenting information such as height, weight, distance and age, for example.
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Please Help! Thank you
The side of the small square is equal to the length of the rectangles, which is 16cm.
What is area?Area is a quantity that measures the size of a two-dimensional surface or shape. It is expressed in square units such as square centimetres (cm2), square metres (m2) or square kilometres (km2). Area is used to describe the size of a garden, a house, a room, a city and much more. It can also be used to calculate the amount of material required for a project, such as paint, carpet or tiles. Knowing the area of a shape can help to calculate costs, and to make sure that enough materials are ordered.
We can calculate the area of the small square by using the formula A = side² where A is the area and side is the length of the side of the square. Thus, A = 16² = 256 cm².
Now, the area of the large square is equal to the area of the small square plus the area of the four rectangles. The area of each rectangle is equal to 16 x 4 = 64 cm² Thus, the total area of the large square is 256 + 4(64) = 512 cm²
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Does (2, –2) make the equation y = –5x + –2 true? yes or no
(2, -2) does not make the equation y = -5x - 2 true.
Why it is and what is an equation ?
We can check if the point (2, -2) satisfies the equation y = -5x - 2 by plugging in the values of x and y and seeing if the equation is true:
y = -5x - 2
-2 = -5(2) - 2
-2 = -12
Since -2 is not equal to -12, the equation is not true for the point (2, -2). Therefore, (2, -2) does not make the equation y = -5x - 2 true.
An equation is a mathematical statement that shows that two expressions are equal.
It typically consists of one or more variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, exponents, and roots.
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How can you determine if two functions are inverses graphically?
An inverse function is defined as a function, which can reverse into another function.
I'm not sure if this is right I can't exactly remember