Solve the system of equations by elimination.
2x + 2y = -2

3x - 2y = 12

Plz hurry evaluate the expression a+b where a=8 and b=19

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units

Azookeeper predicted the weight of a new baby elephant to be 233 pounds when it was born. the elephant actually weighed 265 pounds at birth. what was the percent error of the zookeeper's prediction? asap