We see a right triangle here.
Use the Pythagorean Theorem:
a^2+b^2=c^2
a & b=legs
c=hypotenuse
a^2+15^2=20^2
a^2+225=400
a^2=175
a=13.2287565553
a=13.2
The missing side is 13.2cm
        
             
        
        
        
The equation in standard form would be,

All you have to do is move -2/7x to the other side.
Hope this helped
:D
 
        
        
        
Step-by-step explanation:
just take from me..your most best and smarties person ever...i don't know the answer
 
        
                    
             
        
        
        
Answer:
35
Step-by-step explanation:
Area is multiplication! Volume is adding so just add!
 
        
             
        
        
        
Answer:
C.$0.15 I TOOK IT ON STUDY ISLAND
Step-by-step explanation:
First, you want to find an exact point on the graph.  What I mean by this is you want to go somewhere on the graph where the line goes through an exact y and x value.
Second, you want to figure out where this x and y value are.  Where the graph first goes through two points is at (20, 3).
Third, you want to figure out what the 20 and the 3 mean.  20 is the number of messages and 3 is the dollar amount.
Finally, to calculate the amount of money per message, you divide the dollar amount (3) by the number of messages (20).  So, you have 3/20.  After this, simplify 3/20 to get 0.15, or 15 cents per message.