Question

Question #f669d

Answer 1

`x=8`

Explanation:

I'm assuming the function `p(x)` represents profit, which equals income minus cost. Therefore,

`p(x) = r(x) - c(x)`

`p(x) = (15x) - (80 + 5x)`

`p(x) = 10x - 80`

Now, we need to find `x` when `p(x) = 0`. To do this, we substitute `0` for `p(x)` and solve:

`0 = 10x - 80`

`80 = 10x`

`8 = x`

So the students will need to sell 8 shirts to break even.

Final Answer