Answer:
He is 62.72 inches tall now
Step-by-step explanation:
the twelve over 100 is the percentage, he increased by 12 percent. and the x over 56 is the new value (x) over the old value. We get 6.72 so we add that to 56 to get 62.72.
You would have to add x1 + x2 and divide by 2. do the same with y1 and y2.
(1/2,-1/2)