Answer:
0.5hrs
Step-by-step explanation:
Let the speed downhill be
,
Speed uphill is
. We are told than speed uphill is
the speed on flat ground. Therefore the speed on level ground will be
.
From this info, we can obtain the actual speed,
on level ground as:

speed, distance and time have the relation
so to obtain time to cover 45miles:

Hence it takes 0.5hrs to cover 45miles on flat ground.
Answer:
The rate would be: 4:20 and the unit rate would be 1:5.
Step-by-step explanation:
Answer:
5(x-3)
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
9/m+4
9/3+4 (m=3)
3+4
7
Answer
Step-by-step explanation: