Derrick rode 21 total km. 
You can find this by adding the 3 distances together and multiplying by 3. Also remember to watch the units as 500m = .5km. 
        
             
        
        
        
Scale factor is given by:
(length of larger figure)/(length of smaller figure)=(width of larger figure)/(width of the smaller figure)=3.4
The length of the larger figure will be given by:
length=(scale factor)*(length of smaller figure)
=3.4*6=20.4 cm
width of the larger figure will be given by:
width=(scale factor)*(width of smaller figure)
=3.4*4.5
=15.3 cm
Therefore the dimension of the new parallelogram will be 20.4 cm by 15.3 cm
 
        
             
        
        
        
Answer:
The answer is 19
Step-by-step explanation: 13 scored from 91-100, and 6 scored from 81-90, all you have to do is add them together.
 
        
                    
             
        
        
        
Answer:
see below 
Step-by-step explanation:
Standard equation for a circle with center h,k and radius r 
(x-h)^2 + (y-k)^2 = r^2 
so for this one   center =  (1,2)   radius = 4 
 
        
             
        
        
        
The total number of arrangements for all of them to be women is:
C(7, 4) because the order does not matter; we'd still have the same arrangements.
Now, we can simplify this:




Now, the total number of arrangements, without restriction, is simply: C(12, 4) because we don't care who we pick.
