1. Solve the system and write the answer as an ordered pair.
y = -2x - 10
y = 3x + 5

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Answer pls man im trying to get out of summer school

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years