I think that the answer is B. I tried to read more about the question to understand it more but got nothing out of it. 
        
             
        
        
        
Books are rectangles so that means that opposite sides are equal so if one side is 10 inches then so is the opposite side. same for the 8. the perimeter is the amount around the rectangle so you must add all sides together to find it so
10in+10in+8in+8in= 36in
        
             
        
        
        
Answer: x=21
Step-by-step explanation:
To solve for x you must first combine you like terms on each side of the equal sign. So you problem will become 8x+1=22+7x. Then get your x on one side and your numbers on the other by taking the one away from the right side and 1 away from 22. Then take away 7 from the left side to cancel it out. Then take 7x away from 8x to leave you with x. making your answer x=21
 
        
                    
             
        
        
        
C. 0.0031 
6.2 divided by 2,000 = 0.0031
        
             
        
        
        
Hi there! :)
Answer:

---- Starting with: ----
x² - 10x + 24
Since we have a leading coefficient of 1, simply find two numbers that sum up to -10 and multiply into 24.
By guessing and checking, we get the numbers -6 and -4. Put these into factors:
(x - 6)(x - 4) 
Therefore, a binomial present in factored form is D. x - 4