How do you solve 5x - 5y = ?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

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

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?