Question

Carlotta handpaints T-shirts and sells them to her friends. She uses the equations below to determine her costs and the amount of money she makes when she sells the shirts.

Production Cost: c=28+3s, where c is the total cost and s is the number of shirts
Amount Made: a=10s , where a is the amount and s is the number of shirts

How many shirts must Carlotta sell to make a profit?

Answer 1

The correct answer is 5 not 4

Explanation:

I just took the quiz on edge

Answer 2

Profit = Income - cost
Profit = 10s - (28 + 3s) = 10s - 28 -3s = 7s - 28.

Profit = 0

0 = 7s - 28

7s = 28
7s = 28/7
s = 4. This is the breakeven point.

Carlota must sell more than 4 shirts to make a profit