一道英文数学题,求解Becca runs at an average speed of 4 miles per hour

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一道英文数学题,求解
Becca runs at an average speed of 4 miles per hour.On Saturday she ran for 5 hours including a break.
1.Write an expression to show how long her break was if she ran a distance of X miles.

The time Becca took a break was 5 minus that X divided by 4.

一道英文数学题,求解Becca runs at an average speed of 4 miles per hour His average speed had been 301 miles per hour.句子成分 his average speed had been 299 miles per hour 求：the average speed over the 8 miles is 33 miles per hour.怎么 the train is moving at the speed of 120 miles per hour. GRAHAM WALKED TO SCHOOL AT AN AVERAGE SPEED OF 3 MILES AN HO 关于英语改错题求教1.The train runs in a speed of 70 miles an hour whe The car runs( at a speed of 120km per hour.)对括号里提问,怎么提问 Although Campbell reached a speed of over 304 miles per hour 英语翻译reach a speed of over 50 miles per hour,这里的a speed of是固定 I often speed at 70 miles an hour如果把speed当名词用,那用at the speed Esther drove to work in the morning at an average speed of 4