Answer:
Step-by-step explanation:
integral(x/(1+x^2)^2)dx
=(1/2)integral(2x/(1+x^2)^2)dx
=(1/2)[-1/(1+x^2)] +c
Answer:
A. One line
Step-by-step explanation:
Let rearrange the system of equations into explicit forms:




The second equation is identical to the first one, which means that there is just one line.
Answer: <em>n </em>-<em> 4 = -15</em>
<em>n </em>= -11
Step-by-step explanation:
If -15 is the same as 4 less than <em>n, </em>that means that <em>n </em>- 4 = -15
Then you add 4 to each side of the equation to get <em>n </em>by itself. (-15 + 4 = -11)
That step leaves you with <em>n</em> = -11
Answer: 
Step-by-step explanation:
Given
Distance traveled is 
for s=150 ft

Answer:
6x the number.
Step-by-step explanation:
"Twice a certain number" means that you are multiplying that number (x) by 2.
"Tripled" means that the number (x) would be further multiplied by 3.
Simplify: 3 x 2 = 6
The resulting number would be 6x greater than the original number.
~