$20 dollars if you start with $18 and subtract what his parents gave him its $10 then double it so $20 is the answer
        
             
        
        
        
Answer:
Step-by-step explanation:
14 = -7w/8
Cross multiply
-7w = 14 × 8
-7w = 112
w = 112/-7
w = -16
 
        
             
        
        
        
Answer:
3/5
Step-by-step explanation:
Self explanatory.
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
<u>Given</u>
- DE = 3x + 2, EF = x + 5, DF = 23
<u>As per segment addition postulate</u>
<u>Substituting values:</u>
- 3x + 2 + x + 5 = 23
- 4x + 7 = 23
- 4x = 16
- x = 4
 
        
             
        
        
        
Answer:
83 is prime
97 is prime
92 is composite - The pairs are (1,96) (2,46) (4,23)
Step-by-step explanation: