algebra
posted by RAM on .
Assume that the mathematical model C(x) = 16x + 130 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between $525,000 and $781,000?

7810 = 16x+130
x = 480
5250 = 16x+130
x = 320
between those