The midpoint between y and 31 is −5. find y.
30 points if you get the answer!

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Answer! if you don’t mind, can you explain

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.