Suppose, for each triangle in the diagram, the measurements that are labeled are known, while the other measurements are unknown. in which triangle can you directly substitute known values into the law of cosines to find an unknown side or angle? ∆abc ∆def ∆xyz ∆pqr ∆jkl

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?