Urgent help needed please

An equation where variables are used to represent known values—function notation true or false

X+y=-4 x-y=2 use elimination with adding and subtraction

`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. ''.