Mary is running a marathon which is a total of 26 miles. she is running at a pace of 7.5 miles per hour and has already run 8 miles. if she stays at the same pace, how much time in hours does she have left?

is this a multiple choice question?

if so it's a and c

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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).