Answer:
a=-5
Step-by-step explanation:
divide both sides by -2: -5=a
a=-5
Answer:
140
Step-by-step explanation:
Answer:
put 8/3
Step-by-step explanation:
Given

Answer:
Only student 2
Step-by-step explanation:
This is a proof that the angles in a triangle equal 180°:
The top
line (that touches the top of the triangle) is
running parallel
to the base of the triangle.
So:
<span>
<span>angles A are the
same </span>
<span>angles B are the same </span>
</span>
And you can easily
see that A + C + B does a complete
rotation from one side of the straight line to the other, or <span>180°</span>