Option B is correct 
Why
3x=21
3(7) =21
21=21
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
115°
Step-by-step explanation:
Supplementary angles equal 180.
180-65=115°
 
        
                    
             
        
        
        
Answer: 0.08 is 10 times as great as 0.008
Step-by-step explanation: 0.008 x 10 = 0.08
 
        
                    
             
        
        
        
Answer: - 49
Step-by-step explanation:
f(x) = -2x - 1
g(x) =  - 1
 - 1
fg(x) = f ( - 1) , we just put in the value of g(x) , the next thing is to substitute
 - 1) , we just put in the value of g(x) , the next thing is to substitute  - 1 for the value of x in f(x) , that is
 - 1 for the value of x in f(x) , that is
fg(x) = -2( - 1) - 1
 - 1) - 1
fg(x) = -2 + 2 - 1
 + 2 - 1
fg(x) = -2 + 1
 + 1
Therefore : fg(-5) means we will substitute -5 for x in fg(x) , that is
fg(-5) = -2 ( + 1
 + 1
fg(-5) =  -2(25) + 1
fg(-5) = -50 + 1
fg(-5) = -49
 
        
             
        
        
        
Answer:
a  = M -Gh/G
Step-by-step explanation:
in order to make a the subject of fomular , you will open the bracket first and then combine the like terms.
G(a + h) = M
Ga + Gh  = M
Ga = M - Gh
since G is disturbing a from standing alone, we divide both sides by G
Ga/G = M- Gh/ G
a  = M -Gh/G