Need the last one is the question and the first one is. number 20 and the second is number worry about number 19 i already did thay as u can

i don't have the answer rn but go to math papa. it shows the steps and the answer. hope this : )

step-by-step explanation:

-232

step-by-step explanation:

hope this is what you were asking for!

step-by-step explanation:

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).