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Question: questions 18 19 and 20...

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Questions 18, 19, and 20

18. To make a special mix for Valentines Day, the owner of a candy store wants to combin chocolate hearts that sell for $5 per pound with candy kisses that sell for $3.50 per pound. Write and solve a system of equations of a mix that sells for $4.50 per pound. to find how many pounds of each kind yield 30 pounds E R (r + R) 19, Solve for r: p = 2 20. A landscaper wants to put a cement walk of uniform width around a rectangular garden that measures 24 by 40 feet. She has enough cement to cover 740 square feet. To the nearest tenth of a foot, how wide should the walk be to use up all the cement? Hint: see Example 9 in section 1.7
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