A=adult ticket           s=student ticket                         
64a+132s=$1040
 a=2s
128a+132s=$1040
260tickets=$1040
$1040/260=$4
s=$4      (1s=$4x1)
a=$8      (2s=$4x2)
132s=$528       (132x$4)
64a=$512           (64x$8)
TOTAL=$1040 
        
             
        
        
        
Answer: Look at my attached example.
Hopefully this helps with converting units.
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
Direct variation is a special case of first order equations; in both cases, the input is multiplied by a constant which we call the "slope" or "constant of variation."  However, no direct variation equation includes a constant ("y-intercept").  So, if a given equation does have a y-intersect, that equation does not represent direct variation; if it does NOT have a y-intercept, that equation represents direct variation.
A)  involves a constant term, -2; NOT direct variation
B)  involves a constant term, 10; NOT direct variation
C)   Here 3y = x, or y = x/3, involves no constant term, so Does represent direct variation
D)  involves a constant term -3; NOT direct variation
 
        
             
        
        
        
80 because 80 * .90 = 72.
        
                    
             
        
        
        
Answer:
<1 and <2 and adjacent angles