Glenda plans to paint her bedroom, and she is mixing paint to create the right color. She starts with a white base paint and pours in some blue paint. Right now, her mixing bucket contains 5 quarts of paint, with a concentration of 20% blue paint. Glenda wants to increase the blue paint concentration to at least 30%, but less than 35%. Which inequality should Glenda use to find the number of quarts of blue paint she should add?

its totaly b

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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).