Answer:
P(2 quarters) = 19/ (13*16) = 19/208  = 0.0913
Step-by-step explanation:
probability of getting 2 quarters?
ok
first draw:  there are 20 quarters to choose from
second draw: there are 19 quarters left to choose
so Total coins are 65 coins
P(2 quarters) = P( 1st quarter)* P(2nd quarter)
P(2 quarters) =  20/65   *   (19/64)
P(2 quarters) = 4/13 *  19/64
P(2 quarters) = 19/ (13*16) = 19/208
 
        
             
        
        
        
Sum of two interiors=exterior




 
        
             
        
        
        
2.   I think the answer is 24
subracting the last 2 inequalities we get
6x + 7y <= 42
3x + 2y  <= 18    subtract:_-
3x + 5y <= 24
        
             
        
        
        
To get it into standard you need to simplify 
6y - 12 = -3x add 12 to both sides
6y = -3x + 12 add 3x to both sides
3x + 6y = 12 
And that is in standard which is A + B = C
        
             
        
        
        
It should be 117.5 because in a kite, the angles all add up to 360, and since the remaining unknown angles are the same, you just subtract 38+87 from 360 and divide by 2