A coin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. What percent of the metal in the coin is copper?

Simplify the expression 10/11(22z) + (a+5) -1

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)