And explain how you did these problems : ) me with 14,16,18,20,22

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∣∣

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Plz hurry evaluate the expression a+b where a=8 and b=19