Answer:
a
Step-by-step explanation:
 
        
             
        
        
        
Since this is a equilateral triangle all angles are equal to each other. All angles in a triangle always add up to 180 degrees.
So you would set up your equation like so
3(7x - 3) = 180 
The 3 outside the parenthesis resembles the 3 angles. 
You equal the equation to 180 since all the angles in a triangle = 180 
So distribute the 3
21x - 9 = 180
Add 9 to both sides 
21x = 189 
Divide 21 on both sides
x = 9
        
             
        
        
        
we are given 

where 
F is the number of board feet 
d is the diameter (in inches) of the log
Since, we have to minimize F 
so, firstly we will find it's derivative 


now, we can set it to 0 
and then we can solve for d


so, we get diameter as
 ..............Answer
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Answer:
Step-by-step explanation:
Important:  Please use " ^ " to indicate exponentiation:  5(3x - 4)^2 is correct.
This is "five times the square of the difference between 3x and 4."
 
        
             
        
        
        
If 1 inch is .25 miles then all you have to do is multiply .25 miles by 5 inches and u get 1.25 miles.