Jay rode his motorcycle 100 mi into the mountains. On the return trip he was able to average 5 mi/hr faster. If the round trip
took 5 hr, how fast (to the nearest tenth of a mile per hour) did he travel going each way?
7.5 mi/hr going; 12.5 mi/hr returning
75.3 mi/hr goirfg; 80.3 mi/hr returning
none of the answer choices
O 2.7 mi/hr going; 7.7 mi/hr returning
O 37.7 mi/hr going; 42.7 mi/hr returning