Question 15271
Complementary angles means that the sum of the angles equals 90 degrees.


x+5 + 4x -15 = 90
5x -10 = 90
5x - 10 + 10 = 90 + 10
5x = 100
x= 20 degrees--  Final answer!


However, as a check, let's find the two angles and see if they add up to 90 degrees.

x+5 = 25 degrees
4x-15= 80-15 = 65 degrees
25 + 65 = 90
It checks!


R^2 at SCC