prep 1 155

Kath1985 · 发表于 2011-5-9 19:30:21

155.16166-!-item-!-187;#058&010984

A certain brand of gasoline costs $1.25 per gallon.Using this gasoline, if a car averages 30 miles to the gallon, what is the cost of the gasoline needed for the car to travel 120 miles?

(A) $4.50

(B) $5.00

(C) $5.50

(D) $6.00

(E) $6.50

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【答案】B
請問黃色部分是什麼意思

chenche8827 · 发表于 2011-5-9 20:06:57

平均30miles用1gallon油

chenche8827 · 发表于 2011-5-9 20:07:29

120/30=4
4*1.25=5

prep 1 155

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