(Y+40)+(x+2y)=180
3y+x=140
2x+(y+20)=180
2x+y=160
Simultaneous equation 
3y+x=140
Y+2x=160
Solve for y
Y=24
3(24)+x=140
X=140-72=68
not sure about the answer
        
             
        
        
        
Step-by-step explanation:
-5 , -2, |-2| ,|3|, 8
the absolute value makes the sign positive no matter what, for example |-2| becomes 2
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Remark
The measurement of the arc is 3Pi
that represents 108 / 360 of the circle.
Equation
108/350 2 * pi * R = 3* pi
Solution                             
Pi is on both sides of the equation. They both cancel.
108/360 = 0.3
0.3 * 2 * R = 3
0.6 * R = 3
R = 3/0.6
R = 5
 
        
                    
             
        
        
        
Answer:
x to the third power is x cubed or x^3.
 
        
                    
             
        
        
        
12 x 6 x 3 = 216
Volume = 216 cm cubed
216/0.03 = 7200
Answer = 7200 pencils
Hope it helped :)