Answer:
Step-by-step explanation:
y=-1 ans.
x=2*-1=3
x=-2+3
x=1 ans.
Proof:
4*1-5*-1=9
4+5=9
9=9
Use a proportion
11 x
--- = ---
10 7
just solve for x
I think the Answer is 64 !!!
Answer:
C. Vertical angles are supplementary if both are right angles.
Step-by-step explanation:
You want to know the conditions when vertical angles are supplementary.
<h3>Supplementary angles</h3>
Two angles are supplementary when they total 180°.
<h3>Vertical angles</h3>
Vertical angles are formed when two lines cross. They share a vertex, but not a side. Their sides are opposite rays.
Vertical angles are always congruent.
<h3>Supplementary vertical angles</h3>
If x is the measure of one of two supplementary vertical angles, then we must have ...
x + x = 180°
2x = 180° . . . . . collect terms
x = 90° . . . . . . . divide by 2
Vertical angles will be supplementary if and only if they are both right angles.