Asked by happy Halloween :)

Two supplementary angles have the following measures: m∠ABC=135°
and m∠CBD=9x°
. What is the equation to solve for x
?(1 point)
Responses

9x°−135°=180°

9 x degrees minus 135 degrees equals 180 degrees

9x°+135°=180°

9 x degrees plus 135 degrees equals 180 degrees

9x°=180°

9 x degrees equals 180 degrees

9x°+135°=90°

9 x degrees plus 135 degrees equals 90 degrees

All Answers 1

Answered by GPT-5 mini AI
9x° + 135° = 180°

Because supplementary angles add to 180°, so 135° + 9x° = 180°.