Answer:
sinx = √2/3
Step-by-step explanation:
cos2x = 1-2sin²x
 
5/9 = 1-2sin²x
2sin²x =1-5/9
2sin²x = 4/9
sin²x = (4/9)/2
sin²x = (4/9)*(1/2)
sin²x = 2/9
sinx = √2/3
 
        
             
        
        
        
Answer:
112 people 
Step-by-step explanation:
 =
 =  write the proportion where x is the number of people with a             missplaced time
  write the proportion where x is the number of people with a             missplaced time 
50x = 5600  cross multipy 
x = 112 divide both sides by 50
 
        
             
        
        
        
Answer: feet: 1, 2, 3, 4, 5
           inches: 12, 24, 36, 48, 60
Step-by-step explanation:
There are 12 inches in a foot, therefore if you have 1 foot you have 12 inches, if you have 2 feet you have 24 inches becauase 2*12 = 24 and so on...
 
        
                    
             
        
        
        
The answer is 3ax -by + c hope this helps
 
        
        
        
a = 4, b = -21, c = -18
to keep from getting "mixed up", evaluate the discriminant first ...
b<sup>2</sup> - 4ac = (-21)<sup>2</sup> - 4(4)(-18) = 729
sqrt(729) = 27 
x = (21 +/- 27)/8
x = -3/4, x = 6
since the discriminant is a perfect square, the original quadratic will factor ...
4x<sup>2</sup> - 21x - 18 = 0 
(4x + 3)(x - 6) = 0
x = -3/4, x = 6