A section of beach erodes 3/4 meter Per year. The beach eroded for 8 years. By how many meters did the length of the beach change. 

How do i solve using pythagorean theorem?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1