Use the given circle to find the values of x, y and z​

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

What is the value of x in the equation 1/5x - 2/3y = 30 , when y = 15