-4x-(-12)=(-11x)+23
       +12             +12
-4x=(-11x)+35
+11x  +11x
 7x=35
 /7  /7
 x=5  
        
             
        
        
        
Answer:
$28.50
Step-by-step explanation:
21 chicken wings= $39.90
1 chicken wing= 39.90÷21= $1.90
15 chicken wings= 15×1.90= $28.50
 
        
             
        
        
        
Sometimes, fractions can be written in 'improper' form, meaning that the top number (numerator) is bigger than the bottom number (denominator). So anything multiplied by a fraction like this will give a bigger number.
For example: 
5 × 2/1 = 10
10 x 10/1 = 100
        
                    
             
        
        
        
Answer:
I think its 9 & 12 maybe?
Step-by-step explanation:
Depending on what grade this is, that might be correct but im not 100% sure
 
        
             
        
        
        
 Measurement of angle DEF would equal 180 because 71 plus 109 is 180