help me with this topic pls

Answer:

I think it is 2,304

Step-by-step explanation:

Answer: $158.00

Step-by-step explanation:

Sales tax = $13.49

Amount after tax = $158.49

Rounding off to nearest cent = $158.00

Answer:

81

Step-by-step explanation:

Given the relationships \(a \propto y^2\) and \(b \propto \frac{1}{y}\), let's solve for the proportionality constants and then use them to find \(x\) when \(y = 4\).

From the given values:

1. When \(x = 18\) and \(y = 2\), we have \(a + b + 4 = 18\).

2. When \(x = -3\) and \(y = 1\), we have \(a + b + 4 = -3\).

We can set up two equations using the given proportionalities and the given values:

Equation 1: \(a = ky^2\)

Equation 2: \(b = \frac{c}{y}\)

Substituting these into the first given condition:

\(ky^2 + \frac{c}{y} + 4 = 18\)

Substituting these into the second given condition:

\(ky^2 + \frac{c}{y} + 4 = -3\)

Solving these two equations will allow us to find the constants \(k\) and \(c\), and then we can use them to find \(x\) when \(y = 4\).

Let's solve the equations:

From the first equation:

\(k(2^2) + \frac{c}{2} + 4 = 18\)

\(4k + \frac{c}{2} + 4 = 18\)

\(4k + \frac{c}{2} = 14\)

From the second equation:

\(k(1^2) + \frac{c}{1} + 4 = -3\)

\(k + c + 4 = -3\)

\(k + c = -7\)

Now we have a system of two equations:

1. \(4k + \frac{c}{2} = 14\)

2. \(k + c = -7\)

Solve the second equation for \(k\): \(k = -c - 7\)

Substitute this into the first equation:

\(4(-c - 7) + \frac{c}{2} = 14\)

\(-4c - 28 + \frac{c}{2} = 14\)

\(-8c - 56 + c = 28\)

\(-7c = 84\)

\(c = -12\)

Substitute \(c\) back into \(k + c = -7\):

\(k - 12 = -7\)

\(k = 5\)

Now that we have \(k\) and \(c\), we can determine the values of \(a\) and \(b\) using the given proportionalities:

\(a = 5y^2\)

\(b = \frac{-12}{y}\)

Finally, substitute these values of \(a\), \(b\), and \(y\) into the equation \(x = a + b + 4\) to find \(x\) when \(y = 4\):

\(x = 5(4^2) + \frac{-12}{4} + 4\)

\(x = 80 - 3 + 4\)

\(x = 81\)

So, when \(y = 4\), \(x\) is 81.

The surface area of a cylinder can be found by adding the areas of the top and bottom circles, as well as the area of the side (lateral) surface.

The radius of the cylinder is 1 and one fourth centimeters, which can be written as 5/4 cm. The height of the cylinder is 3 and three fourths centimeters, which can be written as 15/4 cm.

The area of each circle is πr^2, where r is the radius. So, the area of the top and bottom circles is:

2π(5/4)^2 = 25/2 π square centimeters

The lateral surface area of a cylinder is given by the formula 2πrh, where r is the radius and h is the height. So, the lateral surface area of the cylinder is:

2π(5/4)(15/4) = 75/2 π square centimeters

Therefore, the total surface area of the cylinder is:

25/2 π + 75/2 π = 100/2 π = 50 π square centimeters

So, the exact surface area of the cylinder in terms of π is 50π square centimeters. None of the given options matches this answer.

The linear regression equation that represents this set of data is given as follows:

y = 1.05x - 10.43.

The estimated homework grade for a student with a test grade of 31 is given as follows:

39.46.

To find the regression equation, also called line of best fit or least squares regression equation, we need to insert the points (x,y) in the calculator.

The points for this problem are given as follows:

(58, 52), (75, 66), (66, 68), (85, 74), (53, 38), (74, 65), (78, 76).

Inserting these points into a calculator, the equation is given as follows:

y = 1.05x - 10.43.

The estimated homework grade for a student with a test grade of 31 is x when y = 31, hence:

31 = 1.05x - 10.43

x = 41.43/1.05

x = 39.46.

More can be learned about linear regression at https://brainly.com/question/29613968

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Answer:

the expression would be

x=4 X y

Answer:

n = -1 5/14

Step-by-step explanation:

-8 - 5 1/4n = -7/8

{Add 8 to each side}

-5 1/4n = 7 1/8

{Divide each side by -5 1/4}

n = -1 5/14

Answer:

[tex]x=-6\dfrac{7}{8}[/tex]

Step-by-step explanation:

[tex]Solve\:9\:\dfrac{1}{4}\:+\:x\:=\:2\:\dfrac{3}{8}[/tex]

Step 1:
Convert all mixed fractions to improper fractions.
This will make it easier to add and subtract

Mixed fraction [tex]a\dfrac{b}{c}[/tex] can be converted to an improper fraction using

[tex]a\dfrac{b}{c}=\dfrac{a\cdot \:c+b}{c}[/tex]

[tex]9\dfrac{1}{4}=\dfrac{9\cdot 4+1}{4} = \dfrac{37}{4}[/tex]

[tex]2\dfrac{3}{8}=\dfrac{2\cdot 8+3}{8} =\dfrac{19}{8}[/tex]

Step 2:
Replace every mixed fraction in the original equation with its equivalent improper fraction:
[tex]\dfrac{37}{4}+x=\dfrac{19}{8}[/tex]

Step 3
Solve for x

Answer:

21/32

Step-by-step explanation:

Answer:

A. y = 2x + 0 B. The slope of the equation is 2, which means that for every 2 eggs, you need 4 cups of flour. C. For 8 eggs, you would need 16 cups of flour.

Answer: 16 cups of flour

Step-by-step explanation:

As amount of flour is directly proportional to number of eggs,

2/4 = 8/y

y = 8*4/2 = 16

Answer:

x = 47

Step-by-step explanation:

We need to solve for the interior angle measure x. To get x, we know that the sum of the triangles angle measures are 180, so lets write an equation to find x.

[tex]x+102+31=180[/tex]

Add like terms

[tex]x+133=180[/tex]

Subtract 133 on both sides

[tex]x=47[/tex]

To check our work, we can add the angle measures together so we know we got it right.

[tex]47+102+31=180[/tex]

Answer:

x=48

Step-by-step explanation:

add 102 and 31 then subtract it by 180

Answer:

Step-by-step explanation:

the answer would be D

we can rewrite the function as F(y) = y^2. notice that this function is written as F(y) rather than F(x). if this were a function of y we would write it as F(x)= squareroot(x)

the difference between a function of x and a function of Y is that in a Function of x the x value will be isolated and in a function of y the y value will be isolated.

Answer:

y = -4x + 13

Step-by-step explanation:

y = mx + b

We need the slope (m) which was given to us: -4

We need to find the y-intercept (b)

We will use the point given (2,5) and the slope to find b.

y = 5   from the point (2,5)

x = 2   from the point (2,5)

m = -4  given

substitute these into the equation

y =mx + b

5 = (-4)2 + b

5 = -8 + b   Add 8 to both sides

5 + 8 = -8 + 8 + b

13 = b

We now know that m is -4 and b is 13.  Write the equation

y = mx + b

y = -4x + 13

Answer:

m<3 = 50 degrees

Step-by-step explanation:

All the angles of a triangle must add up to 180, or else it isn't a triangle

So, 70 + 60 + m<3 = 180

130 + m<3 = 180

m<3 = 180 - 130

m<3 = 50

Answer:

50 degrees

Step-by-step explanation:

Answer: The Answer would be-

                     4.83

Step-by-step explanation:

4 5/6 as a decimal is 4.83

Answer:

152 grams of zinc

Step-by-step explanation:

You can always first create some ratios to clean it up

[tex] \frac{zinc}{copper} = \frac{4}{19} = \frac{x}{722} [/tex]

x being zinc, what we need to find

Next we can cross multiply

[tex]19x = (722)(4)[/tex]

[tex]19x = 2888[/tex]

Lastly, we will divide both sides by 19 to get X alone.

[tex]x = 152[/tex]

Answer

6;2;1

Step-by-step explanat

first angle is three times that of the second angle.

second angle is two times that of the third angle.

so first angle is 6 times that of the 3rd angle.

so 6;2;1

Answer:nonlinear i think

Step-by-step explanation:

Answer:Therefore, the percent change from 56 to 77 students is 37.5%.

Step-by-step explanation:

students, we can use the following formula:

percent change = ((new number - old number) / old number) x 100%

Plugging in the values given in the problem, we get:

percent change = ((77 - 56) / 56) x 100%

percent change = (21 / 56) x 100%

percent change = 0.375 x 100%

percent change = 37.5%

Therefore, the percent change from 56 to 77 students is 37.5%.

Answer: 37.5%

Step-by-step explanation:

m=2

[tex] \frac{6.5}{40.3} = \frac{m}{12.4} [/tex]

[tex]40.3m \: = 6.5 \times 12.4[/tex]

[tex]m = \frac{6.5 \times 12.4}{40.3} [/tex]

[tex]m = \frac{80.6}{40.3} [/tex]

[tex]m = 2[/tex]

Answer:

M = 2

Step-by-step explanation:

Equivalence means to be same, whether it be value, temperature, size, etc.

If equivalence means to be the same, we can use this equation to figure out what M is equal to.

So, in order to solve for M, we need to divide 6.5 by 3.25.

Therefore, M = 2.

Answer:

12 ≥ n

Step-by-step explanation:

8 minutes a lap is EXTREMELY slow, what is she doing? Crawlling?

96/8 ≥ n

12 ≥ n

Answer:

12 laps.

Step-by-step explanation:

If she runs 8 minutes a lap and she runs 96 minutes in total then all you have to do is divide 96 by 8.

96÷8=12

Answer: A

Step-by-step explanation:

cakes = x pies = y

total number of cakes and pies sold: 75

so x + y = 75

Total money earned: $340

so $4 of x amount cakes + $5 of pies sold =$340

So,

x + y = 75

4x + 5y = 340

Answer:

 62 26 80  

Step-by-step explanation:

The interest earned is $60 and the balance of the account is $460. The interest and the balance of the account will be both calculated with their given formulas.

An expense or payment for using borrowed money is interest; it is occasionally stated as a percentage of the principal borrowed. It could also be applied to the returns on investments or savings. Interest is the cost that a borrower typically reimburses a lender for the use of their funds.

A. We must use the formula-

Interest = Principal x Rate x Time, to calculate the interest earned.

Here, Interest = $400 divided by 0.03 and multiplied by 5.

Earned interest is $60.

B. We must utilize the formula-

Balance = Principal + Interest, to determine the account's balance.

Balance = $400 + computed interest in this instance.

Balance: $400 + $60.

The account's balance is $460.

To know more about interest:

https://brainly.com/question/29451175

Answer:

Yes

Step-by-step explanation:

Because they all have one vertex and one curved surface or face.

Answer:

yes

Step-by-step explanation:

because there all the same shape

Answer:

C. -6.1, -6 4/9, 6.3..., 630%

Step-by-step explanation:

-6.1 in mixed number form is -6 1/10, making it greater than -6 4/9. This is because, if the numbers were positive, -6 4/9 would be greater than -6.1, but since the numbers are negative, it's opposite.

Therefore, the answer is:

C. -6.1, -6 4/9, 6.3..., 630%

Have a nice day and your welcome! Mark brainliest! <3