emilylandry
Answered

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The sum of the speeds of two trains is 721.6 miles per hour. If the speed of the first train is 4.4 mph faster than that of the second train,
find the speeds of each, what is the speed of the first train?

Sagot :

sqdancefan

9514 1404 393

Answer:

  • first: 363 mph
  • second: 358.6 mph

Step-by-step explanation:

Let f represent the speed of the first train. Then the second train's speed is (f-4.4) and the total speed is ...

  f +(f -4.4) = 721.6

  2f = 726 . . . . . . . . . add 4.4; next, divide by 2

  f = 363 . . . . . . . . . . . speed of the first train in miles per hour

  f -4.4 = 358.6 . . . . . . speed of the second train in miles per hour

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