Answer:
B
Step-by-step explanation:
I've taken a picture of the way I solved it.
Add up the numbers and divide by how many there are
(64 + 69 + 73) / 3 = 206/3 = 68.66
Answer:
52
Step-by-step explanation:
the answer is 52 because all the angles have to add up to 360 and 128+126+54=308 and 360-308=52
Answer:
See below.
Step-by-step explanation:
Composition of the functions is sometimes commutative.
Under certain circumstances, they can be the same. However, most of the time, they are not commutative.
For instance, if we have f(x)=x^2 and g(x)=x^3, then:

Most of the time, however, this won't work.
Edit: Added an example.