What are the roots of the polynomial equation x cubed minus 6 x = 3 x squared minus 8? Use a graphing calculator and a system of equations. –40, –4, 5
–5, 4, 40
–4, –1, 2
–2, 1, 4

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).