Question 355516
Angles 1 and 2 are complementary.



If this is true, then angle 1 + angle 2 = 90.



5x + 15 + 10x = 90



15x + 15 = 90



15x = 90 - 15



15x = 75



x = 75/15



x = 5



angle 1 = 5x + 15



Let x = 5 and solve for angle 1.



angle 1 = 5(5) + 15



angle 1 = 25 + 15



angle 1 = 40 degrees.