Can someone me . they are using the pythagorean thm. a^2 + b^2 = c^2

Arational number that is equivalent to -20/4?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.