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2 years ago

Pls help answer this before 8pm

Mathematics

1 answer:

attashe74 [19]2 years ago

3 0

Answer:

Step-by-step explanation:

16 + 12 + 5 + 3 = 36

16 prefer email, 36 total students surveyed

16:36 / 4 = 4:9

4 out of 9 students prefer email

4:9 x 680 = 302.222

302 students can be expected to prefer email.

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Katie made two pies for the bake sale. One was cut into three equal slices and the other into 5 equal slices.she will continue t

Marina CMI [18]

The answer would be 3

5 0

3 years ago

The function C(x) = 25.50x + 50 models the total cost for a cleaning company to clean a house, where x is the number of hours it

vodomira [7]

Answer:

The average rate of change is $25.5 per hour, option B.

Step-by-step explanation:

Average Rate of Change

When we are explicitly given some function C(x), we sometimes need to know the rate of change of C when x goes from $x=x_1$ to $x=x_2$ . It can be computed as the slope of a line .

$\displaystyle m=\frac{C(x_2)-C(x_1)}{x_2-x_1}$

The provided function is

$C(x)=25.50x + 50$

We are required to compute the average rate of change between the points

$x_1=3\ ,\ x_2=9$

Let's compute

$C(3)=25.50(3) + 50=126.5$

$C(9)=25.50(9) + 50=279.5$

$\displaystyle m=\frac{279.5-126.5}{9-3}$

$\displaystyle m=\frac{153}{6}=25.5$

The average rate of change is $25.5 per hour, option B.

7 0

4 years ago

The repeating decimal, 0.27..., is converted to the fraction 0.27..=3/x

marysya [2.9K]

Answer:

The value of x is 11.

Step-by-step explanation:

The given number is 0.27272727..., and it is converted to the fraction as

$0.272727...=\frac{3}{x}$ ..... (1)

Multiply both sides by 100.

$0.272727...\times 100=\frac{3}{x}\times 100$

$27.272727=\frac{300}{x}$ .... (2)

Subtract equation (1) from equation (2),

$27.272727-0.272727...=\frac{300}{x}-\frac{3}{x}$

$27=\frac{300-3}{x}$

Multiply both sides by x.

$27x=297$

Divide both sides by 27.

$x=\frac{297}{27}$

$x=11$

Therefore the value of x is 11.

4 0

3 years ago

Read 2 more answers

How to solve 11x=2x^2+12 by factoring?

andreyandreev [35.5K]

2x^2-11x+12=0

Slip and slide
x^2-11x+24=0
(x-8)(x-3)
(x-8/2)(x-3/2)
(x-4)(2x-3)

Use ZPP
x-4=0
x=4

2x-3=0
2x=3
x=3/2

Final answer: x=3/2, x= 4

8 0

3 years ago

Evaluate each function. 14) g(x)= 3x² - 1; Find g(-3)

Vilka [71]

Answer:

g(-3)= 26

Step-by-step explanation:

g(x)= 3x² - 1

g(-3) means use -3 for x in the given equation.

g(-3)= 3(-3)² - 1

g(-3)= 3(9) - 1

g(-3)= 27 - 1

g(-3)= 26

6 0

2 years ago