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smc

prealgebra senior

Problem

Ray's car averages miles per gallon of gasoline, and Tom's car averages miles per gallon of gasoline. Ray and Tom each drive the same number of miles. What is the cars' combined rate of miles per gallon of gasoline?
(A)
(B)
(C)
(D)
Solution
Let Ray and Tom drive 40 miles. Ray's car would require gallon of gas and Tom's car would require gallons of gas. They would have driven a total of miles, on gallons of gas, for a combined rate of
Final answer
B