Hi I’m in pre calculus and I have no idea how to do this. I tried to look it up online and everything. It’s a take home test and I don’t want to fail please help. I need help with a, b and c with work. :(

What is the range? can’t seem to find it out

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path