Gabrielle is 15 years younger than Mikhail. The sum of their ages is 67 . What is Mikhail's age?

51.

Step-by-step explanation: 62/2=33.5

33.5+18=51.5

mikhail is 51 years old, whereas gabrielle is 33 year old.

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sup

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).