I need help please. I don’t understand it

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∣∣

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Using graph paper, determine the line described by the given point and slope. click to show the correct graph below.(0, 0) and 2/3