HELP ME PLEASE!!! No links

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

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?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer