I'd say its C.15. hope this helps^-^
Algebra
The inverse of -9n is dividing by -9.

Answer:
i got u
Step-by-step explanation:
i got u
Answer:
9000 milligrams
Step-by-step explanation:
One gram is the <em>equivalent of 1000 milligrams</em>.
So, <em>9 grams is 9*1000 milligrams</em>, which is 9000 milligrams.
Answer:
no Solution
Step-by-step explanation:
-12x-12y=4\\ 3x+3y=0
12x-12y=4
add 12y to both sides
12x-12y+12y=4+12y
divid both sides by -12
\frac{-12x}{-12}=\frac{4}{-12}+\frac{12y}{-12}
simplfy
x=-\frac{1+3y}{3}
\mathrm{Substitute\:}x=-\frac{1+3y}{3}
\begin{bmatrix}3\left(-\frac{1+3y}{3}\right)+3y=0\end{bmatrix}
\begin{bmatrix}-1=0\end{bmatrix}