Answer:
The functions g and f are said to commute with each other if g ∘ f = f ∘ g. Commutativity is a special property, attained only by particular functions, and often in special circumstances. For example, |x| + 3 = |x + 3| only when x ≥ 0. ... The composition of one-to-one functions is always one-to-one.
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The answer is C) 16 blocks.
We will use the distance formula for this problem:

From your house to the internet cafe:

From the internet cafe to your friend's house:

Together, we have 10.2+5.7=15.9, which rounds to 16 blocks.
Answer: The side length of the other sides are the same as the first side.
Step-by-step explanation: This is beacuse an equilateral triangle is described as having congruent sides and angles.
Note: This answer could be wrong, beacuse there is no image referring to the question you have.
Answer:
cos 0=90 degrees
Step-by-step explanation:
If sin of 90 is 1 then cos 90 is 0. Since sin and cos are like complementary angles they angles add up to 90 degrees.

and since sin 90 equal 1 cos of 0 equal 1.
What if we switch angles
Well they are still equal

But this time sin of 0 is 0 and cos 90 is 0.
Answer:
1st figure out how many feet in 1 yard
Then you can take that number <x>
X x 5
Step-by-step explanation: