Given:
Consider the below picture attached with this question.
The given expression is:

To find:
The next step.
Solution:
We have,

Cancel out the common factors.

Therefore, the correct option is D.
 
        
             
        
        
        
Answer:
The answer to part A is 15 cm because you would first divide 16 by two to find the base of one triangle. Then you would do the pythagorean theorem to find the height. <em> I don't know if that would help.</em>
The answer to part B is 240 cm squared because you would find the area of one right triangle and multiply it by 4 to find the area of all the sides of the box. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
4.5
Step-by-step explanation:
1/2 times base times height
( Area of a triangle )
1/2(3)(3)
=4.5
 
        
             
        
        
        
Answer:y=-1/5-x
Step-by-step explanation: