(x^2) - 16 / x+4 = (x-4)(x+4) / (x+4) = x-4, x not equal to -4
D is the answer.
This is a direct variation
C = pi*d
pi is a constant and it does thru (0,0)
Answer:

Step-by-step explanation:
Given:

add all together with exponents
=48*290
= Then turn into a smaller exponent
= 
combine like terms

=
<span>The coefficient for x^7*y is equal to 8Choose7 which is 8!/7! which is 8, or answer b. Pascal's triangle may be used to capture this as well, or use the exponent as above.</span>