What the code the name is and they're off

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?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi