the sum of tow numbers is 20 the difference between three times the first number and twice the second is 40 find the numbers

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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