What is the number half way between -46 and 20?

Icould really use some with this question.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.