Eric hauled a load of lumber for 3hrs from Dallas to Kansas, while Sam was hauling stones for 4hrs from Kansas to Dallas. They met up at truck stop to get dinner. The distance from Dallas to Kansas is 542 miles and Sam’s ave. speed was 8mph slower than Eric’s. Find the speed of Sam.

Talia took the bus from her home to the bank and then walked back to her home along the same route. the bus traveled at an average speed of 40 km/h and she walked at an average speed of 5 km/h. to determine the time, x, that it took talia to walk home, she used the equation 40(0.9 – x) = 5x. the time of trip 2 is hours. the distance of trip 1 is km.