6.5c + 9.7a = 1721.4
a = 4c
6.5c + 9.7(4c) = 1721.4
6.5c + 38.8c = 1721.4
45.3c = 1721.4
c = 1721.4 / 45.3
c = 38...so there were 38 childrens' tickets <==
and 152 adult tickets
        
             
        
        
        
Answer:
d    <   27
Step-by-step explanation:
Solve for d by subtracting 8 from both sides.  This isolates d:
d + 8 < 35
    -8      -8
-------    -------
   d    <   27
 
        
             
        
        
        
Answer:
5,1 
Step-by-step explanation:
x= tan27⁰ x 10 ≈ 5,1
.....
 
        
                    
             
        
        
        
Answer:
easy
Step-by-step explanation:
its B
 
        
                    
             
        
        
        
(1 1/2 × $8.40)×7 = x
($12.60)×7 = x 
$88.50 = x
Therefore, x = $88.50