Read method 2 of the article to understand how to do it:
https://www.wikihow.com/Balance-Chemical-Equations
Answer:
900
Step-by-step explanation:

in this one x=9 ask if you need an explanation
Answer:
8 x 6 = 48
48 divided by 2 = 24
24 x 2 = 48
10 x 12 = 120
120 x 2 = 240
8 x 12 = 96
Add all given areas:
48 + 96 + 240 = 384 in2 is your answer.
Answer:
Step-by-step explanation:
it's 3 hmmm it tells you rise over run.. just about where they are asking for the answer.. what do you not get about the question?