Which quantity is proportional to 20/5?

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?