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Find the surface area of a cylinder with 50 inches long and a raduis of 2 inches

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out