Which algebraic expression represents this phrase? the product of 86 depth of the river

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∣∣

An equation where variables are used to represent known values—function notation true or false

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}