2x - 15
x+9
For what value of x would the expression be undefined

Having a hard time understanding this question (see attachment).

`if you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain. ''.

If a line is defined by the equation y = 5x + 2, what is the slope?