Solve the problem using two linear equations in two variables and Cramer's rule.Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 500 gal of gasohol containing 10% alcohol? (Round to the nearest whole gallon.)

A. 208 gal 5%, 292 gal 12%
B. 25 gal 5%, 60 gal 12%
C. 357 gal 5%, 357 gal 12%
D. 143 gal 5%, 357 gal 12%


Answer: D

Mathematics

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