8x + 7y = 39
4x - 14y = -68
(multiply each term in second equation by -2)
8x + 7y = 39
-8x + 28y = 136
(add both equations)
35y = 175 
(divide both sides by 35)
y = 5
(substitute value of y in one of the equations)
8x + 7(5) = 39
8x + 35 = 39 
8x = 4
x = 1/2 
(x, y) = (1/2, 5)
        
             
        
        
        
Answer:
quad 3
Step-by-step explanation:
Subtract multiples of 360
944 -360
584
584 -360
224
0-90 is in quad 1
91 -180 is in quad 2
181 - 270 is in quad 3
 
        
             
        
        
        
19 is the answer for this question
        
             
        
        
        
Make the denominators equal by multiplying them: 

Subtract: 

Simplify:

The answer is 

or 0.16
 
        
        
        
Her friend is right Danielle needs to work for 5 hours