I need help on this
i don't understand AT ALL

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

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?

Which expression is the factorization of x^2+10+21