Can somebody please answer this?

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∣∣

Why do interests rates on loans to be lower in a weak economy than in a strong one

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry