Which point satisfies the inequality 2x+y>10

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52