I think it's 10 meters per second.
        
                    
             
        
        
        
Answer:
E
Step-by-step explanation:
because it makes sense
 
        
                    
             
        
        
        
Answer:
y = -3/4(x+4)
Step-by-step explanation:
The point slope formula is given by
y-y1 = m(x-x1)
where m is the slope and (x1,y1) is a point on the line
y-0 = -3/4(x - -4)
y = -3/4(x+4)
 
        
                    
             
        
        
        
Answer:
B.
Step-by-step explanation:
To simplify something that looks like  you would multiply the top and bottom by the conjugate of the bottom. So you multiply the top and bottom for this problem I just made by:
 you would multiply the top and bottom by the conjugate of the bottom. So you multiply the top and bottom for this problem I just made by:
 .
.
If you had   , then you would multiply top and bottom the conjugate of
, then you would multiply top and bottom the conjugate of  which is
 which is  .
.
The conjugate of a+b is a-b.
These have a term for it because when you multiply them something special happens.  The middle terms cancel so you only have to really multiply the first terms and the last terms.
Let's see:
(a+b)(a-b)
I'm going to use foil:
First:  a(a)=a^2
Outer: a(-b)=-ab
Inner:  b(a)=ab
Last:    b(-b)=-b^2
--------------------------Adding.
a^2-b^2
See -ab+ab canceled so all you had to do was the "first" and "last" of foil.
This would get rid of square roots if a and b had them because they are being squared.
Anyways the conjugate of  is
 is
 .
.
This is the thing we are multiplying and top and bottom. 
 
        
                    
             
        
        
        
I believe the correct situation is C