Which choice correctly identifies the center and the radius of the circle expressed by the equation x² + y2 + 10x - 2y - 10 = 0?
1) C: (5, -1)r=6
2) C: (5, -1) r= square root 10
3) C: (-5, 1) r= 6
4) C: (-5, 1) r= square root 10

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?