Answer:
8a + 9b and 16a - 10b
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The plumber worked 50 hours, and his assistant worked 25 hours.
Step-by-step explanation:
Since a plumber and his assistant work together to replace the pipes in an old house, and the plumber charges $ 30 an hour for his own labor and $ 20 an hour for his assistant's labor, and the plumber works twice as long as his assistant on this job, and the labor charge on the final bill is $ 2000, to determine how long did the plumber and his assistant work on this job the following calculation must be performed:
40 x 30 + 20 x 20 = 1200 + 400 = 1600
50 x 30 + 25 x 20 = 1500 + 500 = 2000
Therefore, the plumber worked 50 hours, and his assistant worked 25 hours.
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
Took quiz 
 
        
             
        
        
        
Answer: 
1. No extra fees unless we need out order sooner (2 weeks for an extra $50)
2 .orders of 1000 or more are 40 cents a piece orders of fewer thank 1000 are 60 cents a piece 
3. The brochure will arrive in three weeks so we need to pay an extra $50 to get them before the show
Step-by-step explanation:
I’ve done this already but if you need me to explain lmk:)