The angles ∠CFE and ∠AFB are vertically opposite angles. Then the value of x will be 6.
<h3>What is an angle?</h3>
Angle is the space between the line or the surface that meets.  And the angle is measured in degree. For complete 1 rotation, the angle is 360 degrees. 
Vertically opposite angle - When two lines intersect, then their opposite angles are equal.
We know that the angle ∠DFE is 90°.
Then the sum of the angle ∠CFD and ∠DFE will be
∠CFD + ∠DFE = 27° + 90°
∠CFD + ∠DFE = 117°
Then the angles ∠CFE and ∠AFB are vertically opposite angles. Then we have
∠CFD = ∠DFE
Put the values 
21x - 9 = 117
     21x = 126
         x = 6
More about the angled link is given below.
brainly.com/question/15767203
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Answer:
C
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
0.066
Step-by-step explanation:
We solve this question using z score formula
z = (x-μ)/σ, where
 x is the raw score
 μ is the population mean
σ is the population standard deviation
For the question
 mean birth weight for boys is 3.27 kg, with a standard deviation of 0.51 kg.
x = 2.5
Hence:
z = 2.5 - 3.27/0.51
z = -1.5098
Probability value from Z-Table:
P(x ≤ 2.5) =P(x < 2.5) = P(x = 2.5) = 
=0.065547
Therefore, the proportion of baby boys that are born with a low birth weight is 0.066
 
        
             
        
        
        
Answer:
The minutes wouldn't it be hours?
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
18x-2