How do i know what a, b, and c are?

1. are the triangles similar and if so why? what is the value of x? show your work.

Given the graphed function below which of the following orders pairs are found on the inverse function

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters