#9 the sum of two angles is 90 degrees, creating a right angle.
#10 the sum of the two angles is 180 because the form a supplementary angle
Answer:

Step-by-step explanation:
Given
The attached triangle
Required
Find x
The theorem that applies to this question is the theorem of external angles. And it translates to:

Collect Like Terms



Divide through by 6



Answer:
this is a rubric for an assignment not the work :)
Step-by-step explanation:
yay brainlyest
The answer to (-7)+1+4= -2
The complementary is not entering the store one minute before closing.
The probability of not entering the store one minute before closing is 75%