1. If NK = 7 and KL = 15, find NL.

2. If m∠JMK = (8x – 13)° and m∠LMK = (4x + 19)°, find x.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

What is the gcf of 20c^3-5c^4+30c^6

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?