Which set of angles can from a triangle?

Write the equation below the represents the line passing through the point (-3, -1) negative one with a slope of 4

Triangle abc is reflected over the line y=x triangle abc has points (-6,-,-1) and (-5,-6) what is the c coordinate

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2