Two angles are supplementary if they add up to 180 degrees.
Given the angle 76 degrees, the supplement is 180-76 degrees, or 104 degrees.
Before answering, keep in mind that parallel lines have equal slopes and perpendicular lines have negative reciprocal slopes. Each problem has you find the slope and then use that rule.
For line F, 
Let x
= 7, x
= 9, y
= 13, y
= -3


m = 8
For line E, the calculations are similar and the slope is 3/5. The perpendicular line would have m = -5/3.
Where are the equations and then I am happy to help.

=0 is the answer
Factor it (x+3)(x-1)
Set each to 0 x+3=0 and x-1=0
Solve each for x x=-3 and x=1
Ta da :)
Hope that helps
Answer:
30.76%
Step-by-step explanation:
subtract 450-650=200
200÷650×100=30.76
Answer:
y=3x+-7
Step-by-step explanation:
the standard form is y=mx+b
m being the slope and b being the y intercept