Answer:
<h2> 22.2</h2>
Step-by-step explanation:
Step one
given the coordinates
ABCD with vertices A(-2,-2), B(-1,3), C(5, 3), and D(4, -2)
AB=(-2,-2),(-1,3)
BC=(-1,3), (5, 3)
CD=(5, 3),(4, -2)
DA=(4, -2),(-2,-2)
The distance between points AB=
 

The distance between points BC=

The distance between points CD

The distance between points DA

Hence the perimeter = 5.1+6+5.1+6
= 22.2
 
        
             
        
        
        
20:12
i think. 20 being the number of total students to 12 which is the number of boys
 
        
             
        
        
        
So I hope this helps and is exactly what you are looking for
 
        
        
        
Ok to find dy/dx of x+2y=xy we take derivative of both sides with respect to x
1+2dy/dx = x*dy/dx +y*dx/dx
1+ 2dy/dx = x*dy/dx + y* 1
2dy/dx +1 = x*dy/dx + y
2y’ + 1 = xy’ + y
2y’ + 1 - xy’ = y
2y’ -xy’ = y - 1
y’(2-x) = y - 1
so we get finally 
y’= (y-1)/(2-x) 
Hope this helps you understand the concept! Any questions please ask! Thank you so much!!
        
             
        
        
        
Answer:
81
Step-by-step explanation:
To do "how many times greater" problems, you divide.  Think how you would answer this:  How many times greater is 48 than 6?  Dividing the larger 48 by the smaller 6 gives 8.  48 is 8 times greater than 6.
Do the same thing for these two masses.
6 x 10^24 divided by 7.4 x 10^22 is about 81.
The attached image shows a TI-83 display.