math

posted by .

jen can run at 7.5 m/s and mary at 8.0 m/s. on a race track jen is given a 25 m head start, and the race eds in a tie. how long is the track?

let x = distance run by jen.
x + 25 = distance run by mary.

time jen = d/r = x/7.5
time mary = d/r = (x+25)/8

Since they arrived at the finish line at the same time, then the times for the two are equal. Set them equal and solve for x, the distance run by jen which is the full distance of the track. Post your work if you get stuck and need further assistance. Check my thinking. Check my work carefully.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A relay race is run along a straight line track 300.0 m long running south to north. 1st runner - starts at the South end of the track and passes the baton to a teammate at the north end of the track. 2nd runner - races back to the …
  2. math

    The track coach plans to make 8 lanes each 1-meter wide on the running track. The track measures y meters along the inside curb. The track has straight parallel sides and semicircular ends. If the runners in a race lined up at the …
  3. Algebra

    Jan can run at 7.5 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
  4. Algebra

    Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
  5. Physics

    A race car travels on a flat circular track at the maximum possible speed without slipping. If the radius of the track is 39m and the coefficient of friction is 0.73, how long (seconds) does it take the race car to complete 5 laps?
  6. Geometry

    Dana is planning to ride her bicycle around the circular race track and wants to know the distance. If the diameter of the track is 2 mile, how far is the distance around the race track?
  7. Physics

    You can run 8.0 m/s , 20% faster than your brother. How much head start should you give him in order to have a tie race over 90 m ?
  8. physics

    A race car track has been constructed with the a bank angle of 32.7° so there is no friction force. The race car track has a curve radius of 394 m. What speeds, for the race cars, has the track been designed to accommodate?
  9. Math

    one track coach wants his athletes to race 8 miles around a track to measure how fast each person can run if the track is 2/3 of a mile around. How many laps around the track will the athletes have to run to complete the race?
  10. Math

    there is a track next to the barbecue area the track is 1/4 mile long. a group of students have a relay race. they run around the track 4 times. draw a number line to show how many miles the students can. use 0 and 1 as points on your …

More Similar Questions