Question

Jeans are on sale for 20% off the regular price. which function would give you the total cost for purchasing a pair of jeans that cost x dollars
a. f(x)=0.2x
b. f(x)= 0.2x-x
c. f(x)= x-0.2x​

Answer 1

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Answer:

Your answer would be C). f(x)= x - 0.2x​

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Step-by-step explanation:

In this question, you are trying to make an equation that specifically tells the person the cost of the jeans AFTER the discount was subtracted from the original cost of the jean.

From that, your first hint would be that you are subtracting 20% of the original cost of the jean.

We need to find 20% of x (x represents the cost of the jean), so we would multiply.

In order for it to multiply, we need to turn the % in a decimal.

To do this, we would move the decimal place two times to the left.

20% is the same as 20.0

When you move the decimal places two time sto the left, you would get 0.2

Since you're trying to find 20% of x, you would get the 0.2 you just found and put it next to x, since you're going to multiply.

0.2x

Now you would need to represent the original cost of the jean, so you would have the variable (x) by itself in the equation.

f(x) = x - 0.2x is your FINAL answer.

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-Julie