Question

You have already made $12 for school by selling a pie you made at a bake sale. you will earn $3 more for each additional brownie you sell, which algebraic expression models this situation

Answer 1

It is given in the question that

You have already made $12 for school by selling a pie you made at a bake sale. you will earn $3 more for each additional brownie you sell.

Let the number of additional brownie is x.

Let C represents the cost function.

So C is equal to the sum of fixed cost, 12, and cost of additional x brownie.

So the required expression is

$C(x) = 12+3x \\ C(x)=3x+12$