Answer:
#1
Step-by-step explanation:
20 hours.
Step-by-step explanation.
The total distance traveled was 400 miles. Then I divided 400 by 20. I got 20.
x:y =x: y
10: y =2:3
2y=30
y=15
y:z=y:z
15:z=3:5
3z=75
z=25
(x+7)÷5