Ef/df
is completely correct
Is there a picture that goes with the problem
Answer:
x=30
Step-by-step explanation:
The two angles are on a straight line, so they are supplementary. They add to 180 degrees.
4x+20+40=180
Combine like terms
4x+60=180
Subtract 60 from both sides
4x+60-60=180-60
4x=120
Divide both sides y 4
4x/4=120/4
x=30
A) False
B) False
C) True
<em>( I'm not too sure though, compare my answer with yours and make a decision... sorry I couldn't be more help...) </em>