Answer:
Sorry to answer your question with a question, but are you using an algebra 1 book?
 
        
                    
             
        
        
        
Answer:
40 cm squared
Step-by-step explanation:
8 x 5 = 40
 
        
                    
             
        
        
        
 The awnser is 22 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
4
Step-by-step explanation:
- 2r = 5s/2 - s/4                    ⇒ bring to common denominator
- 2r = 10s/4 - s/4
- 2r = 9s/4
- 9s = 8r                                ⇒ multiply both sides by 4
- s = 8r/9                               ⇒ divide both sides by 9
- s = 8/9*9/2                         ⇒ replace r with 9/2, simplify
- s = 4                                    ⇒ answer