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2 years ago

6

Mark is online buying songs to download to his smart phone. He has a $20 gift card. He sees that there is a one time fee of $10

to sign up. Then each song cost $1.99.
Write the any quality that models the situation above.

1 answer:

Rashid [163]2 years ago

7 0

Answer:

20 - 10 = 10 - 1.99 = 8.00

Step-by-step explanation:

sorry if it's wrong brainliest plzzzzzzzzzzzzzzzzzzzzz

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Identify the graphical solution to the inequality

NeTakaya

Answer:

A

Step-by-step explanation:

to solve absolute value inequalities you must solve it for when the absolute value is positive and then when it is negative

example, |4| = 4 and -4

first solution will be when we're solving for the positive value:

+(-4x+7) ≥ 27

-4x + 7 ≥ 27

-4x ≥ 20

x ≤ -5 [reverse the symbol when mult or div by a negative]

-(-4x+7) ≥ 27

4x - 7 ≥ 27

4x ≥ 34

x ≥ 34/4 or x ≥ 8 1/2

solution: x ≤ -5 or x ≥ 8.5

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2 years ago

You are assigned 32 math exercises for homework. You complete 87.5% of these before dinner. How many do you have left to do afte

Hunter-Best [27]

You would have 4 left after dinner: (.875)(32)=28 so you have 28 completed before dinner and would have 4 left to do.

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3 years ago

A gym owner has some yellow weights and some red weights. The yellow weights are 6 kilograms each, and the red weights are 8 kil

gogolik [260]

Answer:

The store owner has two of each color weights

Step-by-step explanation:

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2 years ago

Find the standard deviation of the following data. Round your answer to one decimal place. x 0 1 2 3 4 5 P(X

lbvjy [14]

Answer:

<em></em> $\sigma = 1.8$ <em></em>

<em></em>

Step-by-step explanation:

Given

$\begin{array}{ccccccc}x & {0} & {1} & {2} & {3} & {4}& {5} \ \\ P(x) & {0.2} & {0.1} & {0.1} & {0.2} & {0.2}& {0.2} \ \end{array}$

Required

The standard deviation

First, calculate the expected value E(x)

$E(x) = \sum x * P(x)$

So, we have:

$E(x) = 0 * 0.2 + 1 * 0.1 + 2 * 0.1 + 3 * 0.2 + 4 * 0.2 + 5 * 0.2$

$E(x) = 2.7$

Next, calculate E(x^2)

$E(x^2) = \sum x^2 * P(x)$

So, we have:

$E(x^2) = 0^2 * 0.2 + 1^2 * 0.1 + 2^2 * 0.1 + 3^2 * 0.2 + 4^2 * 0.2 + 5^2 * 0.2$

$E(x^2) = 10.5$

The standard deviation is:

$\sigma = \sqrt{E(x^2) - (E(x))^2}$

$\sigma = \sqrt{10.5 - 2.7^2}$

$\sigma = \sqrt{10.5 - 7.29}$

$\sigma = \sqrt{3.21}$

<em></em> $\sigma = 1.8$ <em> --- approximated</em>

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3 years ago

A computer program found that the line y=3x - 52 is the best line of best fit to represent the temperature outside and the amoun

Aliun [14]

Answer:

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Step-by-step explanation:

given x = 50

=> y = 3(50)-52 = 150-52=98

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3 years ago