What is leg 1, leg 2, and hypotenuse? Find the distance between two points in simplest radical form. Please answer correctly

The system of equations graphed below has how many solutions?

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?