We are given the quadratic:

, with a=1, b=-8, c=15.
We know that the x-coordinate of the vertex, which is the point where the line of symmetry passes through is                                   

.
Thus, the x-coordinate of the vertex is 

.
Thus, the line of symmetry is x=4.
Answer: <span>B. The line of symmetry should have been 4 instead of –4. </span>
 
        
        
        
Answer:
35cm²
Step-by-step explanation:
Area = trapezium + triangle 
Trapezium = ½×(8+4)×2 = 12
Triangle = ½×8×5.75 = 23
Area = 12+23 = 35 cm²
 
        
             
        
        
        
Three consecutive integers that have a sum of 45 are 14, 15 and 16. 14+15+16=45
 
        
                    
             
        
        
        
Answer:
72%
Step-by-step explanation:
13 divided by 18 is .72 so, as a percentage, this is 72%