What is the arc length?? Look at the pic

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.