PLEASE HELP ME ASAP Use the law of Cosines to solve for x. Fill in the blanks of the law of cosines below and then solve for x. Round your answer to the nearest whole degree.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

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.