About 100. (Im not quite sure)
 
        
                    
             
        
        
        
Step-by-step explanation:
1. -9x - 3 - 3 + 2x 
-7x - 6
 
3. 3 - 4x - 7x - 2
-11x - 1
4. 5x - 1 + 3 + 2x 
7x + 2
 
        
             
        
        
        
Just look it up on the web that will help a lot
        
             
        
        
        
The plumber worked for 5 hours because 450-200=250 which gets rid of the initial fee so 250 divided by 50 is 5
        
             
        
        
        
Answer:
The probability that exactly 19 of them are strikes is 0.1504
Step-by-step explanation:
The binomial probability parameters given are;
The probability that the pitcher throwing a strike, p = 0.675
The probability that the pitcher throwing a ball. q = 0.325
The binomial probability is given as follows;

Where:
x = Required probability
Therefore, the probability that the pitcher throws 19 strikes out of 29 pitches is found as follows;
The probability that exactly 19 of them are strikes is given as follows;
 
 
Hence the probability that exactly 19 of them are strikes = 0.1504