To solve/simplify this all you have to do is group like terms (the x^2's with each other, the x's with each other, and the normal numbers, -8)
14x^2-8+5x-6x^2+2x
group the x^2 (add 14x^2 to -6x^2)
8x^2-8+5x+2x
group the x's together (add 5x and 2x together)
8x^2+7x-8
Your answer will be d) 8x^2+7x-8
        
             
        
        
        
Answer: Stratified Random Sampling 
Step-by-step explanation: Got it right
 
        
                    
             
        
        
        
If you need part A, draw a person and label them 6 feet tall and a shadow coming off of him that is five feet long and draw a basketball hoop that and label it X feet tall and draw a shadow coming from it that is 8 feet long. To solve, you use proportions 6/5=X/8 solving this you get X=9.6 feet which is the height of the rim. Therefore, the rim does not meet regulation height, since the required height (10 feet) is greater than the actual height (9.6 feet).   
        
             
        
        
        
 
1. 15/3:3/3
2. 5:1
 
1. find the same denominator 
2. divide by denominator 
 
        
             
        
        
        
Answer is x7 becuse i found it