Why do people purge or clean out their financial records instead of keeping every financial document they receive?

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

If angle 2=3x +1 and angle 3=2x +4what is angle 2

What function has a range {yly< 5}? question on picture above^