Explain how you can find the y-intercept of a linear equation and how that is different from finding the y-intercept of a geometric equation

Can someone answer this question? : )

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

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.