Answer:

Step-by-step explanation:
All you gotta do is subtract  - b + c from both sides then simplify.
 
        
             
        
        
        
Arrange in ascending order:-
6 7 11 13 14 15 15 19 21
median = 14 
lower quartile  =  mean of 7 and 11 = 9
upper quatile =   mean of 15 and 19 = 17 
Interquartile range = 17 - 9 = 8
answer is 8
        
             
        
        
        
Answer:
This case has NO solutions.
Step-by-step explanation:
Notice that you are in a case of an obtuse triangle (one of its angles is larger than 90 degrees), the side opposite to the obtuse triangle is shorter than the side adjacent to the angle, so no actual triangle can be formed.
This can be found by simply trying to apply the Law of Sines to solve for the value of angle "B" opposite to side "b":

As shown above, we get an impossible mathematical condition (also call an absurd), since the sine of an angle cannot give a value larger than 1 (one).
Therefore, there is no angle we can find to build a triangle with the given data.
 
        
             
        
        
        
If xy=0, assume that x and/or y=0
so we already gots factored
therfor
assume
3n-2=0 and 4n+1=0
solve
3n-2=0
3n=2
n=2/3
4n+1=0
4n=-1
n=-1/4
n=2/3 and/or -1/4
        
             
        
        
        
For three hours is he will take up 5.25gallons.
she will be left with 4.75 gallons