Slope of the line help

Let r = 3. what is the value of r + 58?

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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