Is that a question or answer? If it's a question that's the right answer.
        
             
        
        
        
−8x + 4y = 24 -- (1)
−7x + 7y = 28 -- (2) 
Eqn (1) & (2) are simplified as 
y - 2x = 6 -- (3) 
y - x = 4 -- (4) 
By making y the subject of formula in (4), we have 
y = x + 4 -- (5) 
Substitute x + 4 for y in (3), then 
x + 4 - 2x = 6 
x - 2x = 6 - 4 
- x = 2 
x = - 2. 
Substitute - 2 for x in (5), then 
y = - 2 + 4 
y = 2. 
Therefore, (x, y) = (- 2, 2) ...Ans.
        
             
        
        
        
15 miles/2.5 mph=15/2.5=6 hours left
so 6 hours, 15 miles which is option D
        
             
        
        
        
Question: 
The circumference of a clock is 22 inches. What is the radius of the clock?
Answer:
Radius = 3.5 inches
Solution:
Shape of the clock is circle.
Circumference of the circle = 2πr
Circumference of a clock = 22 inches





⇒ r = 3.5 inches
Hence the radius of the clock is 3.5 inches.
 
        
             
        
        
        
Answer:
yes
Step-by-step explanation:
0.045 is greater than 0.00195