How to do this? (I posted this before but they only gave me the answer and the solution for the 1st and 2nd problem I need to know the third.)

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Anyone know? will mark brainliest if you're correct!

Which of these triangle pairs can be mapped to each other using two reflections?