If f(x) = 3x + 2, what is f(5)?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?