4 of 25 4. Alfred built a raised flower bed using 9 railroad ties of equal length. The railroad ties were each 8 feet long. Which expression has a value equal to the perimeter of the flower bed? A. 23 x 32 B. 32 x 42 C. 42 x 33 O D. 84 x 42

answer: it's a

step-by-step explanation:

- (2, -7)

- lines r and s and lines t and u must be parallel

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).