Answer:
case A. 
case B. 
case E. 
Step-by-step explanation:
we have

we know that

<u>Verify each case</u>
case A) 

therefore
is equivalent to 
case B) 
so
is equivalent to 
case C) 

therefore
is not equivalent to 
case D) 
so
is not equivalent to 
case E) 

therefore
is equivalent to 
case F) 
so
is not equivalent to 
3x+x= 180°(straight angle)
4x= 180°
x= 180/4
x= 45°
Answer:
1/6
Step-by-step explanation:
Its a multiplication by -3 on each term, so I think you're gonna answer is by r=-3, maybe?