I'm super confused and can't figure out the answer, ?

Find an equation (in term of x) of line through the points (-1,3) and (1,4)

Suppose a triangle has two sides of length 32 and 35, and that the angle between these two sides is 120°. which equation should you solve to find the length of the third side of the triangle?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)