Will make

xy - 3y if x=2 and y=4

2ab - 3abc if a = -1, b=2 c=3

top: -4

bottom: -20

Step-by-step explanation:

-4 and -18

Step-by-step explanation:

2*4-3*4

2 times 4 is 8. and 3times 4 is 12 so 8-12 is -4

2times -1 and 2 is -4. and 3*-1*2*3 is -18.

I think

a

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).