Which ratio is equivalent to 22 : 11 ?
1 : 2
2 : 1
2 : 44
66 : 44

Find the value of the cosine for angle a

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

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