For every $5 micah saves, his parents give him $10. what is the constant of proportionality

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?

Find the quotient 9(cos135+isin135)/7(cos10+isin10)