Angela's average for six math tests is 87 on her first four tests she had scores of 93, 87, 82, and 86. On her last test, she scored 4 points lower than she did on her nth test. What scores did Angela receive on her fifth and sixth tests?
Fifth test - 85; sixth test=81
fifth test = 35; sixth test =89
fifth test 90; sixth test=86
Fifth test89; sixth test=85

2x^2+5x+17

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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).