15. The distance a car travels can be found using the formula d= r. t, where d is distance, r is the rate of speed, and t is time. If the car has traveled 120 miles in 3 hours, what is the average rate of speed?

A. 30 miles per hour

B. 40 miles per hour

C. 60 miles per hour

D. 360 miles per hour

Option B. 40 miles per hour

Step-by-step explanation:

Distance = rate of speed ×  time

If Distance = 120 miles and time = 3 hours

we will have

120 = r × 3

120 = 3r

Divide both sides by 3 and we will have

3r/3 = 120/3

r = 40

8

step-by-step explanation:

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.