Some help here please?

Find the sum of the two equations below.

The triangles are similar. what is the value of x? x=

Need on this one asap im almost done with this subject

Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ