−6k + 7k
12r − 8 − 12
n − 10 + 9n − 3
−4x − 10x
−r − 10r

The tangent of an angle is not which of the following? a) ratiob) proportionc) fractiond) opposite over adjacent

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality