Question

A van travels 150 miles on 6 gallons of gas. How many gallons will it need to travel 325 miles?

A.12 gallons
B.2.8 gallons
C.13 gallons
D.25 gallons

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Answer 1

Answer: C) 13 gallons

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Work Shown:

(150 miles)/(6 gallons) = (325 miles)/(x gallons)

150/6 = 325/x

150*x = 6*325 .... see note below

150x = 1950

x = 1950/150 .... divide both sides by 150

x = 13 gallons is the final answer

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Note: in this step, I cross multiplied. The general template for cross multiplication is that we go from A/B = C/D to A*D = B*C. As the name implies, the "cross" refers to the "X" shape that forms when you multiply the terms.