ariellopez2301 ariellopez2301

02-02-2019
Mathematics

contestada

the sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

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tramserran tramserran

02-02-2019

Answer: 1st train = 364 mph, 2nd train = 356.2

Step-by-step explanation:

Train 1: x + 7.8

Train 2: x

Train 1 + Train 2 = Sum

x + 7.8 + x = 720.2

7.8 + 2x = 720.2

2x = 712.4

x = 356.2

Train 1: x + 7.8

= 356.2 + 7.8

= 364

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