Answer:
52
Step-by-step explanation:
 
        
             
        
        
        
2nd one - y = 3/7x + 6 , hope this helps:)
        
             
        
        
        
Answer:
12 fives and 18 tens
Step-by-step explanation:
solving this we need 2 different equations
one for he total bills and one for the total money
x+y=30
that is total bills
5x+10y=240
combining both equations we can use elimination method and get 
12 five dollar bills and 18 ten dollar bills
 
        
             
        
        
        
It would take 9 hours for the reptile food to reach 72.5 degrees Fahrenheit. Hope this Helps!! :)
        
                    
             
        
        
        
To find the answer, subtract j(x) from g(x):
g(x) - j(x)
Plug in the expressions that each function is equal to:
(x^2 - 2x + 11) - (-x^3 - 4x^2 + 5)
Distribute the negative, get rid of parentheses:
x^2 - 2x + 11 + x^3 + 4x^2 - 5
Combine like terms:
x^3 + 5x^2 - 2x + 6