Answer:
BD = 10 √3 
Step-by-step explanation:
 ABC ∆ ,
BD ÷ 20 = sin 60
 BD = 20 sin 60
 BD = (20 √3) / 2
 = 10 √3 
 
        
             
        
        
        
Answer:
x - 2y = 2
Step-by-step explanation:
the equation of a line in standard form is
Ax + By = C ( A is a positive integer and A, B are integers )
given y =  x - 1
 x - 1
multiply through by 2 to eliminate the fraction
2y = x - 2 ( subtract 2y from both sides )
0 = x - 2y - 2 ( add 2 to both sides )
x - 2y = 2 ← in standard form
 
        
             
        
        
        
(a) 2x + 5x + 4 = 25 <== ur equation
    7x + 4 = 25
    7x = 25 - 4
    7x = 21
     x = 21/7
    x = 3
(b) first piece = 2x....= 2(3) = 6 ft <=
     second piece = 5x....= 5(3) = 15 ft <=
        
             
        
        
        
Answer:
It mean's numeric form with exponents.
Step-by-step explanation:
Basically it's a way to write the number better without having to repeat it.
 
        
                    
             
        
        
        
Answer:
The answer is D!!!
Step-by-step explanation:
In the attachment!
I plugged in that equation into a graphing calculator and got this.... 
since it's also a (<, >) sin, we know that it's dotted.....
Hope this helps!