How to simplify rational expressions using factoring? 1. 30a^2+60a+30/
30a^2+10a-20
2. 21v-7/
49v^2-14v-63
3. 15x^3+102x^2+72x/
7x^2+48x+36

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance