Christie has a total of 15 pieces of fruit, all bananas and apples, worth $1.59. bananas are 13 cents each and apples are 7 cents each. how many bananas and how many apples does she have?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Which of the following contains a variable?

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