<span>Arc length = C*(21/360)
so the answer is D</span>
        
             
        
        
        
Answer:
5
Step-by-step explanation:
The equation looks like 4x=20
Divide each side by 4 to get x=5
Thus x+5
 
        
             
        
        
        
6x=-5y
-5y=6x
so the answer is y=-6/5x
        
             
        
        
        
Answer:
<h2>E. 22</h2>
Step-by-step explanation:
<em>Look at the picture</em>.
The lines <em>l</em> and <em>m</em> are parallel, therefore alternate interior angles are congruent.
Therefore 
Supplementary angles add up to 180°.
Therefore
 <em>add 16 to both sides</em>
          <em>add 16 to both sides</em>
 <em>subtract 5x from both sides</em>
         <em>subtract 5x from both sides</em>

We know: the sum of the triangle angle measures is 180°.
Therefore we have the equation:
