Two cars leave the origin; one goes north at 45 mph and the other goes south at 30 mph. after how many hours will they be 400 miles apart?

Question

asked Aug 22, 2018 202k views

1 Answer

Thabiso Mofokeng · Answer 1 · 2018-08-26T15:36:23+0000

400 = 45x + 30x
400 = 75x
5.333 = x

Lets test

45mph for 5.333 hours = 240 miles
30mph for 5.333 hours = 160 miles
240 + 160 = 400 miles apart.