Mathematics
emdavisson
26

Coffee A normally costs 75¢ per pound. It is mixed with Coffee B, which normally costs 80¢ per pound, to form a mixture that costs 78¢ per pound. If there are 10 pounds of the mix, how many pounds of Coffee A were used in the mix?

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(1) Answers
FloriaCollingswor332

Quantity Eq.::: A + B = 10 lbs. Value Eq::::::: 75A + 80B = 78*10 cents ---------------------------------------------- Multiply thru the Quantity Eq by 80. 80A + 80B = 80*10 75A + 80B = 78*10 ----- Subtract and solve for "A": 5A = 2*10 A = 4 lbs (amt. of A needed in the mix hope that helps 

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