Which expression is represented by phrase "the square of y decreased by the quotient 36 and 6

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

2/3(-6y+9x) expand each expression using the distributive property

Solve the equation. 2x - 8(x+1)= 6(2x - 3)