Answer:
y = -12
Step-by-step explanation:
You first calculate the x coordinate using the equation x =  , which in this case is
, which in this case is  .
.
Then plug that x value into the equation to get the y coordinate:
4(-1)²+8(-1)-8 = -12
 
        
             
        
        
        
Answer: 20%
Step-by-step explanation:
25 = 100%
25/5 = 5
100/5 = 20 
That means 80% passed and 20% didnt. 
 
        
                    
             
        
        
        
(x<span> + </span>9)(x<span> – </span>1<span>) = 0. </span>x<span> = -</span>9<span> or </span>x<span> = </span><span>1</span>
        
                    
             
        
        
        
Answer:
step 3 and step 4
Step-by-step explanation:
2(x − 4) + 6x = 9x − 10 
2x - 8 + 6x  = 9x - 10
2x +6x - 9x  = -10 + 8
              -x    = -2
                  x = 2