¿Cuál es la circunferencia de un círculo con un diámetro de 11 mm?

What is the value of x when x + 7 = 21?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

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?