Answer:
(g-f)x is the answers for the question
Step-by-step explanation:
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Answer:
hi
Step-by-step explanation:
 
        
             
        
        
        
Ur not telling us how to solve or what to solve.
 
        
             
        
        
        
For #2, ∠3 and ∠1 are supplementary. You know that the measure of ∠1 is 162°, so what is ∠3? 180-162=18. 
m∠3=18° if ∠1=162°.
Hope this helped!
        
             
        
        
        
Let, the speed of boat = x 
Speed of current = y
So, x + y = 280/7
x + y = 40   ---- first equation
x - y = 280/14 
x - y = 20  
x = 20 + y
Substitute this value of x in first equation, 
20 + y + y = 40
2y = 40 - 20
y = 20/2
y = 10
Substitute this in first equation, 
x + 10 = 40
x = 30
In short, Speed of Boat = 30 mph, & speed of current = 10 mph
Hope this helps!