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You are buying orange juice for $4.50 per container and have a gift card worth $7. The function f(x)=4.50x-7 represents your total cost f(x) if you buy x containers of orange juice and use the gift card. How much do you pay to buy 4 containers of orange juice.

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TaeKwonDoIsDead

The function [tex]f(x)=4.50x-7[/tex] gives the total cost ( f(x) ) of x containers of orange juice (with a $7 gift card).

We want to buy 4 containers, so we plug in 4 into x and find the value of f(x).

[tex]f(x)=4.50(4)-7\\=18-7\\=11[/tex].

You will have to pay $11 in total.


ANSWER: $11

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