The measurement of  ∠B  is 168°
Given,
In the question:
Angle A and Angle B are supplementary angles.
If mA (x - 9)° and m/B= (7x + 21)°
To find the measure of ∠B
Now, According to the question;
What are supplementary angles?
Two angles are Supplementary when they add up to 180 degrees.
Now, ∠A+∠B = 180°
So, 
⇒(x - 9)˚+(7x + 21)°=180°
=> 8x +12 = 180°
=> 8x = 180° - 12 
=> 8x = 168
=> x = 168/8
=> x = 21
For the measure of ∠B :
 ∠B  = (7x + 21)
 ∠B = 7 x 21 + 21 
 ∠B  = 168° 
Hence, The measurement of  ∠B  is 168°
Learn more about Supplementary angles at:
brainly.com/question/13045673
#SPJ1
 
        
             
        
        
        
We know that
the transformation
f(x)--------> f(x+2)
that means
A point (x,y) in graph of f(x)------> become a point (x-2, y) in graph of f(x+2)
hence
point (5,-8)-------------> become a point (5-2,-8)-----> (3,-8)
the answer is
the point (3,-8)
        
             
        
        
        
Answer:
0.1590909999999001
Step-by-step explanation:
5(*$85$84#58$58$85$&(xgkzgkzgkz&)$"(*85dtkdtistozogzfizfjzfjzfjsotyd
 
        
             
        
        
        
The answer is 7/10.  Because it's 7 out of 10.