Answer:
i think it's 10 because if DE is 10 so BD is the same think it's 10
Answer:
1. x = -5 + 5y
2. x = -5 - y/2
Step-by-step explanation:
For #16, it can be assume that the two angles are linear, so set them both equal to 90 (9x+x-10=90) and solve for x. Once you have x, plug it into the equations to find the measure of both angles. If both your final answers are added, they should equal 180. If not, go back and try to find where you messed up.
The sum of the interior angles is 360
