Express 21/10 as a decimal

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-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?

Predict which statements are true about the intervals of the continuous function. check all that apply