The angles are equal (alternate angles in parallel lines)
X + 86 = 80
X = 80 - 86 = -6
Look at one of the graphs you have a question about. Then take a vertical line and place it on the graph. If the graph is a function, then no matter where on the graph you place the vertical line, the graph should only cross the vertical line once.
Yes this answer is correct
First determine the index of the radical
If the index is an even number, set the expression inside the radical greater than or equal to zero.
Solve the equation found above :)
