Question

A student on the track team runs 45 minutes each day as a part of her training. She
begins her workout by running at a constant rate of 8 miles per hour for a minutes,
then slows to a constant rate of 7.5 miles per hour for b minutes.
Which equation describes the relationship between the distance she runs in miles, D,
and her running speed, in miles per hour?
a. a + b = 45
b. Sa+ 7.50 =D
6 8) +7.50 =D
d. 8(45 – b) + 7.5b =D

Answer 1

Answer:D

Step-by-step explanation:

The basic equation to solve this would be D = RT, which is

D is Distance

R is Rate (speed)

T is time

To find total distance D, we can find individual distances for two legs of the whole.

First Leg:

R = 8

T = a

D = 8a

Step-by-step explanation: