Equation.
1/5 x - 2/3 y = 30
     y= 15
Substitution.
1/5 x - 2/3 (15) = 30
1/5 x - 10 = 30
1/5 x = 30 + 10
1/5 x = 40
   x = 200.
        
             
        
        
        
Answer:
 the percent error is 6%
Step-by-step explanation:
Given that 
The estimated people who attend the movie is 250
And, the people who actually attended is 235
We need to find out the percent error 
So
Percent error is 
= (250 - 235) ÷ (235)
= 6.38%
= 6%
Hence, the percent error is 6%
 
        
             
        
        
        
Answer:
78.732
Step-by-step explanation:
Volume is length x width x height so
3.6 x 2.7 x 8.1 is 78.732
        
             
        
        
        
Answer:
2
x
+
y
=
1
Step-by-step explanation: