Bob is taking his son to look at colleges. the first college they plan to visit is 150 miles from their home. in the first hour they drive at a rate of 60 mph. if they want to reach their destination in 2.5 hours, what speed must they average for the remainder of their trip? (i wouldn't mind if you use a proportion since that's how i'm supposed to solve it)

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

s ----> the speed in mph

d ----> the distance in miles

t ----> the time in seconds

step 1

In the first hour they drive at a rate of 60 mph

Find the distance traveled

we have

substitute

so

The remainder of the trip is equal to

step 2

Find out the average speed for the remainder of the trip

we have

substitute the values

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew