Answer:
the answer is C 
Step-by-step explanation:
 
        
             
        
        
        
I want to say it’s the second one
        
             
        
        
        
Answer:
4r- 21
Step-by-step explanation:
4 - r= r and r+ 21/= R21 and Simplified Is -4 and R21
 
        
             
        
        
        
Answer:
1200 words
Step-by-step explanation:
If he types 40 words a minute, you have to multiply that by thirty because he typed 40 words 30 timers. 40 x 30=1200
 
        
                    
             
        
        
        
Answer: The observed ratio is different from the expected ratio.
Step-by-step explanation:
Since we have given that 
Expected ratio :
Ratio of blue flowered plants to white flowered plant = 3:1
Observed results:
Number of blue flowered plants = 35
Number of white flowered plants = 14
So, Ratio of blue flowered plants : white flowered plants 

So, 5:2 ≠ 3:1
Hence, the observed ratio is different from the expected ratio.