2y^4 and 5y^4 because same variable (y), same degree (3)
Correct answer is C..................
Let x be the angle. The complement is 3x + 10. The sum of two complementary angles is 90. So,
x + 3x + 10 = 90
4x + 10 = 90
4x = 80
x = 20
Plug x into the complement
3(20) + 10 = 70
The angle is 20 degrees and the complement is 70 degrees
Add them all together and divide by the number of variables here there are four and the answer is 1.25 or 5/4