Distance to Finish Line (meters)
Jasen
-8t+200
Mary
-7.5t+ 200

Jason and Mary are running an a 200 meter track.
The expressions in the table above show the
distance to the finish line t seconds after they
started the race. How many meters will Mary have
Ieft to finish the race when Jason is on the finish
line?

12.5 meters

Explanation:

Given

--- Jasen

--- Mary

Required

Determine the number of metres left for Mary when Jason finishes

When Jasen finishes the race;

-- Because Jasen is already at the stoppage

So, we need to calculate time spent by Jasen to get to the finished line.

Substitute 0 for J(t)

Collect like terms

Solve for t

What this implies is that: we want to get Mary's distance at time;

Substitute 25 for t in

Hence, Mary has 12.5 metres left