Sally and her husband Jim left their house at the same time traveling in the same direction. Sally drove at 55mph and Jim drove

Question

3 years ago

6

at 65mph. How many hours was it before Jim was 100 miles ahead of Sally?

1 answer:

romanna [79] · Answer 1 · 2022-01-02T12:27:29+03:00

Answer:

It will take 10 hours.

Step-by-step explanation:

We know distance = rate * time

Sally's rate = 55

Jim's rate = 65

We want Jim to be 100 miles ahead of Sally

The time will always be the same.

d =Sally's distance

Sally

d = 55t

Jim

d+100 = 65 t

We know have 2 equations with 2 unknowns. Substitute d= 55t into Jim's equations

55t + 100 = 65t

Subtract 55t from both sides.

55t-55t + 100 = 65t-55t

100 = 10t

divide each side by 10

100/10 = 10t/10

10 = t