Suppose you are driving to visit a friend in another state. You are driving at an average rate of 60 miles per hour. You must drive a total of 420 miles. If you have already driven 180 miles, how long will it take you to reach your destination?

You have 4 more hours left.

Step-by-step explanation:

420-180= 240

240/60=4

The drive is 6 hours and you have already drove 2 hours.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.