Whats the first step to solve, a( b + c ) = d for a

Which statement about the graph of y = 8(0.25)^2

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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