4 miles per hour. rest of the way at an average rate of 5 miles per hour. The entire 3-mile walk took Yi 42 minutes (0.7 hour).solve for x,

Question

Part 1- rate is 4, time is x, and distance is 4x

Part 2- rate is5, time is 0.7-x, and distance is 5(0.7-x)

Answer 1

4x + 5(.7-x) = 3

4x + 3.5 -5x = 3

x = .5 or half an hour at 4mph, going 2 miles

.7-x =.2 or 1/5 of an hour at 5mph going one mile