IK its an obtuse angleeee if that helps
        
             
        
        
        
Answer:
1 4/5
Step-by-step explanation:
37/5-5 3/5
37/5-28/5
9/5
1 4/5
 
        
             
        
        
        
Using the Quadratic Function, Such Means x = - b + or - the square root of - 4 a c over 2 a. 
After you do it you would get the answer :
Hoped I Helped, Have A Great Day :)
 
        
        
        
Answer:
x: work a woman can do in 1 day
y: work a girl can do in 1  day
Then
2x + 7y =1/4
4x + 4y =1/3
4x + 14y =2/4 (1)
4x + 4y  =1/3 (2)
=> Let (1) - (2), 10y =2/4-1/3 <=>10y = 1/6 <=> y = 1/(6x10) = 1/60 (work)
=> From (2),4x = 1/3 - 4x1/60 => 4x = 16/60 => x = 4/60 (work)
=> 1 day, a woman and a girl can do: 1/60+4/60 = 5/60 =1/12 (work)
Then, the day required for a woman and a girl to complete work: 12 days