Answer:
Step-by-step explanation:
a+c=62, c=62-a
7a+3.5c=364, using c found above gives you
7a+3.5(62-a)=364 expand left side
7a+217-3.5a=364 group like terms on left side
3.5a+217=364 subtract 217 from both sides
3.5a=147 divide both sides by 3.5
a=42, since c=62-a
c=62-42=20
So 20 children and 42 adult tickets were sold.
 
        
             
        
        
        
Answer:
Two possible equations:

The system has 0 solution as parallel lines never cross each other.
Step-by-step explanation:
Considering the two lines are parallel, they both have the same slope.
let m be the slope of the two lines:

 are the value on y axis where the two lines cross the axis.
 are the value on y axis where the two lines cross the axis.
Because the lines are parallel, there exists no point that lies on both lines, therefore the system has 0 solution.
 
        
             
        
        
        
Answer:
1/5
Step-by-step explanation:
- the coefficient is the number multiplying the variable
 
        
             
        
        
        
- 31/6 , -26 square rooted, -5, - 5/6
        
             
        
        
        
4.133 kilometers
2.063 + 2.07 = 4.133