Coplanar lines are R, U, and V
        
             
        
        
        
Answer:
2 1/7 pieces
Step-by-step explanation:
A factory makes rectangular sheets of cardboard, each with an area 2 1/2 square feet. Each sheet of cardboard can be cut into smaller pieces of cardboard measuring 1 1/6 square feet. How many smaller pieces of cardboard does each sheet of cardboard provide?
Each sheet of cardboard = 2 1/2 square feet
Each smaller pieces of cardboard = 1 1/6 square feet
Number of smaller pieces of cardboard per sheet of cardboard = Each sheet of cardboard ÷ 
Each smaller pieces of cardboard 
= 2 1/2 square feet ÷ 1 1/6 square feet
= 5/2 ÷ 7/6
= 5/2 × 6/7
= (5*6) / (2*7)
= 30/14
= 15/7
= 2 1/7 pieces
Number of smaller pieces of cardboard per sheet of cardboard = 2 1/7 pieces
 
        
             
        
        
        
Answer:
19.5
Step-by-step explanation:
Circumference is radius multiplied by 2, then multiplied by pi. 
3.1 × 2= 6.2
6.2 × π= 19.477 ≈ 19.5
π also equals 3.14
 
        
                    
             
        
        
        
Answer:
x=9
Step-by-step explanation:
These two angles are equal since they are alternate exterior angles
-1 +14x = 12x+17
Subtract 12x from each side
-1 +14x-12x = 12x-12x+17
-1+2x= 17
Add 1  to each side
-1+1+2x = 17+1
2x = 18
2x/2 = 18/2
x =9