SOLUTION: A contractor buys 15 yd2 of nylon carpet and 26 yd2 of wool carpet for $1345. A second purchase, at the same prices, includes 10 yd2 of nylon carpet and 20 yd2 of wool carpet for $
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Question 1179776: A contractor buys 15 yd2 of nylon carpet and 26 yd2 of wool carpet for $1345. A second purchase, at the same prices, includes 10 yd2 of nylon carpet and 20 yd2 of wool carpet for $990. Find the cost per square yard of the wool carpet. Found 2 solutions by josgarithmetic, ikleyn:Answer by josgarithmetic(39617) (Show Source):
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A contractor buys 15 yd2 of nylon carpet and 26 yd2 of wool carpet for $1345.
A second purchase, at the same prices, includes 10 yd2 of nylon carpet and 20 yd2 of wool carpet for $990.
Find the cost per square yard of the wool carpet.
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Write equations as you read
15N + 26W = 1345 (1)
10E + 20G = 990 (2)
You need find W. Use the determinant method (the Cramer's rule)
W = = 35 dollars. ANSWER
Solved.
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