Question

Sue drove her car at 25 mph for the first part of the trip and then changed her speed to 75 mph for the second part. If the entire trip is 725 miles and took 13 hours, how many hours are traveled at each speed?

Answer 1

first what is the formula in finding speed of the car..?

Answer 2

idk let me see

Answer 3

x+13=725?

Answer 4

time = distance / speed

so,
13 = x/25 + (725-x)/75

where x is distance of the first part of the trip

Answer 5

125?

Answer 6

x = 125. use the formula above to find the time for each part of the trip

Answer 7

13=5+600/75?

Answer 8

it's bout 10 hours at 25 and 3 at 75 because it's 3x faster?

Answer 9

is this right?