Supplementary angle = 180
180 - 51 = x
x = 129
C) 129 degrees is your answer
hope this helps
Those are adjacent angles. They equal 180 degrees.
10x-20+6x+8= 180
16x-12=180
Add 12.
16x= 192
x=12
I hope this helps!
~kaikers
The answer is 35.
We have the ratio 7/9 cross multiply with x/45
7*45 = 315
315/9 = 35
Yes, -9 can be written as a fraction over 1, meaning it is a rational number
