How many times does 1 4/5 go into 54

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2

Find the solution of this system of equation -7x+y=-20 9x-3y=36

For what value of (y) is 3^3/3^y =1/9