Hi
2n³ + 4n² - 7 + (-n³ - 8n - 2) = 2n³ - n³ + 4n² - 8n - 7 - 2
n³ + 4n² - 8n - 9
Answer: n³ + 4n² - 8n - 9
This website explains it http://users.ipfw.edu/maloney/Game%20of%20Sci/Intro%20Stud%20to%20the%20Game%20of%20Sci.pdf
Answer:
Option B is correct.
The reflection rule is followed here is,
.
Explanation:
Since, the triangle is reflected over the x-axis , then only y- coordinates will get changed but the x coordinates will remain the same.



Therefore, the only reflection rule on the coordinate plane that verifies the triangle are congruent when reflected over x-axis is, 
You are able to divide or mutiply both so let's divide. Divide each by four to get1/2. hope this helped.