Car Trips. During the first part of a trip, Meiras Honda traveled 120 mi at a certain speed. Meira then drove another 100 mi at a speed that was 10...

21. Car Trips. During the first part of a trip, Meiras Honda traveled 120 mi at a certain speed. Meira then drove another 100 mi at a speed that was 10 mph slower. If the total time for Meiras trip was 4 hr, what was her speed on each part of the trip? 22. Canoeing. During the first part of a canoe trip, Tim covered 60 km at a certain speed. He then traveled 24 km at a speed that was 4 km h slower. If the total time for Tims trip was 8 hr, what was his speed on each part of the trip?