Question

you have returned some merchandise to a store and received a store credit of $23. in the same store' you are purchasing picture frames that cost $9 each. the function f(x)=9x-23 represents your total cost f(x) if you purchase x picture frames. how many dollars will you pay if you purchase 7 picture frames

Answer 1

$40

Explanation:

If you were to purchase 7 picture frames, you would replace x in the equation with 7, this is shown below.

f(x)=9x-23 ---> f(x)=9(7)-23

Now we can solve for f(x). First start with 9(7).

f(x)=9(7)-23 ---> f(x)=63-23

Now finish the last part by subtracting 23 from 63.

f(x)=63-23 ---> f(x)=40

This means that you would have to pay $40 dollars to purchase the 7 picture frames.