Question

Bob's Skate Shop had a profit of $3,563 during the month of August. The company models its profit using p=x^2+10x-12 , where x is the number of skateboards the company sells. How many skateboards did the company sell during the month of August?

A.
50
B.
55
C.
60
D.
75

Answer 1

In order to solve this for x, the number of skateboards sold, you have to factor it. I found this easiest to do by using the quadratic formula. When you do that you get x values of both 55 and -65. We know that the number of skateboards sold cannot be a negative number, so the answer is 55 skateboards.