A student council group is selling school posters for a fundraiser. They use the function p x = 5 x

Question

A student council group is selling school posters for a fundraiser. They use the function p x = 5 x - 220 to determine their profit p x , in dollars, for selling x school posters. In order to earn a profit of $ 900 , how many school posters must they sell?

Accepted Answer

The correct answer is 224 . It&rsquo;s given that a student council group uses the function p x = 5 x - 220 to determine their profit p x , in dollars, for selling x school posters. Substituting 900 for p x in the given function yields 900 = 5 x - 220 . Adding 220 to each side of this equation yields 1,120 = 5 x . Dividing each side of this equation by 5 yields 224 = x . Therefore, in order to earn a profit of $ 900 , they must sell 224 school posters.

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