Plz help quick I'll give you brainiest answer!
Mr. Stearns wants to buy a lamp for $199, a side table for $85, and light bulbs for $12.

Part B
What is the first step you would do to solve this problem using mental math?
A.

Subtract 5 from 199 and add 5 to 12.
B.

Add 5 to 85 and subtract 5 from 12.
C.

Add 1 to 199 and subtract 1 from 12.
D.

Subtract 2 from 12 and add 2 to 199.

idk u tell me

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).