כד,12
-2(-x+5y) +3(2x – 6y) ?
C. 4x – 28y

Is a positive integer raised to a negative power always positive

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

Solve the triangle. a = 21°, c = 105°, c = 5