Answer:
4.19
Step-by-step explanation:
Find the mean:

Find the standard deviation:

Answer:
Complementary angles are a pair of angles that sum up to 90 degrees. Supplementary angles are a pair of angles that sum up to 180 degrees.
Step-by-step explanation:
The answer is b that’s the correct answer
4+2=6 then you bring the 6 to the other side so you have combine like terms. 6-6=0 so its 0