(4a - 3b + 4c) + (8a - 2b + 3c)

Hey mate, here's ur

(4a - 3b + 4c) + (8a - 2b + 3c)

=4a+−3b+4c+8a+−2b+3c

=(4a+8a)+(−3b+−2b)+(4c+3c)

=12a−5b+7c

Hope it helps

#stayhomestaysafemate

:D

the answer is 21%.

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).