What can you conclude from the diagram A. 8y + 4 = 0
B. (3y + 20) + (5y - 16) = 90
C. 3y + 20 = 5y - 16
D. (3y + 20) + (5y - 16) = 180

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

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

The radius of a sphere is 3 inches. which represents the volume of the sphere?