Answer:
The arc length of the semicircle is half the circumference of the full circle
 
        
                    
             
        
        
        
Answer:
1: C(n) = 2.50 + 16n
2: $66.50
Step-by-step explanation:
Part 1
Each ticket costs $16 per person. If tickets for n persons were purchased, the total cost would be 16n.
There is also a one-time service fee of $2.50 that must be paid. Thus, for n tickets the total cost is
C(n) = 2.50 + 16n
Part 2
For n = 4, the expression evaluates to 
C(4) = 2.50 + 16 (4) = $66.50
 
        
             
        
        
        
21
18=0.86x - 0.09     Put 18 as the y value and solve for x
18.09=0.86x           Add 0.09 on both sides.
21.03=x                  Then divide on both sides by 086
        
                    
             
        
        
        
Answer:
6
Step-by-step explanation:
145-68.50 = 76.50
76.20/12.75 = no of t-shirts she can buy
ans= 6
 
        
             
        
        
        
The algebra tiles show two equal factors. They are (x + 4).
Then, the perfect square is the product of the two equal factors, (x + 4) * (x +4).
That is (x + 4)^2.
Then develop that perfect square to find the constant term.
(x + 4)^2 = x^2 + 8x + 16.
That means that the constant term needed to complete the trinomial is 16.
Answer: 16