154mm
we know that  1cm = 10 mm
  therefore      15cm= 10*15 mm 
                                =  150 mm
and 4 mm
we get total mm= 15cm +4mm
                           = 150mm+4mm
                            = 154 mm                  
mm stands for millimeters and cm stand for centimeters 
learn more of millimeter here brainly.com/question/25862563
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Getting black is 1/4 of the percentage, and spinning it 10 times gives us 10/40, because there are 40 possible colors to land on when u spin it 10 times. The last spin, is just like any other time you spin it. just because it's the last spin, doesn't make the black sector greater. So the answer is 1/4 or 25%.
 
        
             
        
        
        
Answer:
a=  or ≈ -3.66
 or ≈ -3.66
Step-by-step explanation:
-(3a+4)=7
-3a-4=7
<em>Add 4 to both sides</em>
-3a=11
<em>Multiply both sides by -1</em>
3a= -11
Divide both sides by 3
a= 
 
        
                    
             
        
        
        
The answer is 2
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