Answer:
Answer: The statements are numbers 1, 3, 4
The non statements are 2, 5, 6 
Step-by-step explanation:
 
        
             
        
        
        
The answer is d 8x^2 - 10
        
                    
             
        
        
        
Answer:
10.82
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: D (5/2, -17/4)
Step-by-step explanation:  Using elimination your goal is to get rid or 1 variable  so you can solve for the one that's left.  By adding the -2y and 2y you will get 0.  You will also add the 3x+x (4x) and -1+11 (10).  You have now gotten rid of the y and have 4x=10.  By dividing each side by 4 we now know x =2.5.  D is the only possible solution with x=2.5 (5/2) but to solve for y you plug 2.5 in to an equation as x so) x-2y=11
                                                                            2.5-2y=11
                                                                             -2y=8.5                                                                        Answer D (5/2,-17/4)                                      y=-17/4 (4.25)
 
        
             
        
        
        
Area of ∆=1/2bh
 80yd^2=1/2(b)(10yd)
 80yd^2=5yd(b)
 80yd^2÷5yd=b
 16yd=b