Question

Vinnie drives his car 210 miles and has an average of a certain speed. If the average speed had been 3mph more, he could have traveled 228 miles in the same length of time. What was his average speed?

Answer 1

Sorry this took so long.....

Had to get some help from the internet

Have a great day!!!!!

Answer 2

35 mph

Explanation:

time = distance / speed

210 miles and has an average of a certain speed

t = 210 / s

If the average speed had been 3mph more, he could have traveled 228 miles in the same length of time

t = 228 / (s + 3)

Set equal

210 / s = 228 / (s + 3)

Cross multiply

210s + 630 = 228s

Subtract 210s from both sides

630 = 18s

Divie both sides by 18

35 = s

35 mph