Supplementary angles. They both add up to equal 180 degrees
Solution: We are given:
Predicted Sales by Sameera 
Actual Sales by Sameera 
Now to find the Percent error, we have to use the below formula:



Therefore, the percent error is
Domain is all the x values represented
domain here is infinitely because it can go on forever to the left and to the right
Answer:
The following triangle is equilateral triangle. Solve for the
unknown variable. y=17 is the answer
(7 + 5i) - ( -9 + i)
= 7 + 5i - (-9) - (i)
= 7 + 5i + 9 - i
= 16 + 4i
= 4i + 16