2/3x - 1/2y = 3      |multiply both sides by 6
4x - 3y = 18
1/2x + y = 5      |multiply both sides by 2
x + 2y = 10
Answer: B) 4x - 3y = 18 and x + 2y = 10
        
             
        
        
        
Answer: B
Step-by-step explanation:
the parabola having (1,5) as vertex have as equation:
y=k*(x-1)²+5
It is passing through (2,8) 
8=k*(2-1)²+5 ==> k+5=8 ==> k=3
equation is  y=3(x-1)²+5
Answer B
 
        
             
        
        
        
Answer:
55.9548
Step-by-step explanation:
35.64 ÷ 2 = 17.82
17.82 × 3.14 = 55.9548
 
        
                    
             
        
        
        
The answer must be A. For an explanation, please have a look at the picture.