Math
posted by Jerald .
Mark and Sandy are participating in a BikeaThon for charity. Mark oversleeps, so Sandy gets a one hour head start and bikes at a speed of 12 miles per hour. To catch up to Sandy, Mark decides that he needs to bike at a speed of 15 miles per hour.
1. Make a chart that shows how far Mark and SAndy ride their bikes during the first three hours of the Bike a thon
Hour 1: Mark 15mph Sandy 12mph
Hour 2: Mark 30mph Sandy 24mph
Hour 3: Mark 45mph Sandy 36mph

Math 
Ms. Sue
You missed the fact that Sandy had a one hour head start.
At the end of:
Hour 1: Sandy  12 m; Mark 0
Hour 2: Sandy  24 m; Mark 15
Hour 3: Sandy  26 m; Mark 30 
Math 
Jerald
Thank you.
2. WRite an expression that represents Sandy's journey. Be sure to define your variables
t=hour
12t + 12 
Math 
Ms. Sue
You're welcome.
12t 
Math 
Jerald
But didn't she have a one hour head start so she would have had an extra 12 m?

Math 
Ms. Sue
You just need an expression that represents her journey. It doesn't make any difference what time she started.
Respond to this Question
Similar Questions

physics
While on a trail, a mountain biker encounters a sandy patch that is 7.1 m long. The speed of the bike entering the patch is 10.1 m/s. If the force exerted by the sand on the bike/biker system (103.8 kg) is 514 N, determine the speed … 
physics
Coasting due west on your bicycle at 7.9 , you encounter a sandy patch of road 7.0 across. When you leave the sandy patch your speed has been reduced by 2.0 to 5.9 . 1. Assuming the sand causes a constant acceleration, what was the … 
math
Mark averaged 60 miles per hour during the 30mile trip to college. Because of heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip? 
physics
Coasting due east on your bicycle at 8.0 m/s, you encounter a sandy patch of road 7.4 m across. When you leave the sandy patch your speed has been reduced to 5.5 m/s. Assuming the bicycle slows with constant acceleration, what was … 
Math
Describe in words, a situation involving this equation that could be represented 4t+8=3(3.5t). t= miles Mark and Sandy wanted to have a race. Mark has an 8 mile head start and goes 4 miles per hour. Sandy decides to go 3 times as fast … 
Math
Mark and Sandy are participating in a BikeaThon for charity. Mark oversleeps, so Sandy gets a one hour head start and bikes at a speed of 12 miles per hour. To catch up to Sandy, Mark decides that he needs to bike at a speed of 15 … 
Math
It took sandy two hours to jog 13 miles.she ran 7/12 miles in the first hour how far did she run during the second hour 
Math
Sandy can jog 3 2/5 in 5/6 hour. Find her average speed in miles per hour. 
Math/algebra
Sandy drives the first 3 hours of her trip at 65 miles per hour. The last hour of the trip she drives 62 miles per hour. How far did Sandy drive on her trip? 
Math
Mark leaves the house for school walking at the rate of 4 km. per hour. Two hours later Kris follows Mark at a walking rate of 6 km. per hour. How long will Kris have to walk to overtake Mark?