Answer:

Step-by-step explanation:

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C) x+3
first one factors to (x+3)(x-3)
second factors to (x+3)(x-2)
Two angles that added together equal 90 degrees
Answer:
4x^6 y^4 / z^4
Step-by-step explanation:
you have to divide each of the variables by the coefficient
There are 21 people, everyone hugs each other, but the person hugging cant hug themself, so (21*21)-21
(21*21) -21 = 441
441-21=420