The answer is B 15.....
First flip both side: 10/6 = x/9
Find for x:
(10/6) = ×/9
(10/6)×9 = x
x = 15
x=-4 if you are in a hurry
Supplementary angles have measures that add up to 180 degrees.
x + 126 = 180
x = 54
Answer:
Where's the answer?
Step-by-step explanation: