Answer:
18.75 feet of steel pipe weighs 237 pounds  
 explanation:
find out how much 1 feet weighs than u can find out how much 18.75 feet.
by doing it like this  
158÷ 12.5
=12.64
1 feet equals 12.64 pounds
12.64× 18.75
=237 pounds this is the answer 
i do apologize if it wrong 
 
        
                    
             
        
        
        
I am unsure about the very last problem but I can help with the first two
1) (y+1)+4
If we combine the numbers 1 and 4, we get +5 and can isolate the numbers from the variable.
This would give us

2) (6*r)*7
remember that we do not have to explicitly state 6*r
Instead, we can write it as 6r
this helps us get rid of the parentheses
now we can write it as 

I hope this helps!:)
 
        
        
        
Answer:
21.75 miles
Step-by-step explanation:
2 hours=14.5 miles
3 hours=x
2x=14.5*3
x=
 
        
                    
             
        
        
        
Answer:
11.1714
Step-by-step explanation:
Just use a calculator! :)
 
        
                    
             
        
        
        
Answer:
<h2>
7</h2>
Step-by-step explanation:
Plugged it in the calc! 
Hope it helps :)