Answer:
 and
    and    
Step-by-step explanation:
when you solve for r in the given equation, you need to apply the square root property, which gives positive and negative answers (both should therefore be considered):

then you need to include these two possible solutions:
 and
    and    
 
        
             
        
        
        
Answer:
b = -152
Step-by-step explanation:
- 7 + 12 = 19
- Plug 19 in:   
- Multiply each side by 19 to cancel out the 19 under b. It should now look like this: b = -152
I hope this helps!
 
        
             
        
        
        
This is actually a trick question if you were to take this question head on. Say for instance you are cutting all the pieces from the same sheet of metal, the equation would NOT be 8 times 5 equals 40 minutes, but rather 7 times 5 equals 35 minutes. this is because on the 7th cut, it takes that from 6 sheets of metal to 8 because you get 2 from that cut. Take for instence, a Hersheys candy bar. It is 3 bars thick, but it only takes 2 breaks to sever the 3 strips. So, that being said, sam will make 7 cuts and those 7 cuts will make a times of 35 minutes.
        
                    
             
        
        
        
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Answer:
2
Step-by-step explanation:
8328÷24=347
hope this is helpful