Correct me if im wrong . I need help

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Sketch one cycle if the cosine function y=2cos2theta