Answer:
the answer is 11.                                                                         
Step-by-step explanation:
I got it right on Edgenuity. Sorry I got here late
 
        
             
        
        
        
3y= 21 
I think 3y would be 21 because in the equation, 5y+13=48, y= 7. So if we know that y is 7 that’ll mean we’ll use 7 to interpret y for 3y.
        
             
        
        
        
Step-by-step explanation:
Just think of these as your building blocks for geometry success.
Diagram for success. ... 
Know your properties and theorems. 
Understand Euclid's postulates. 
Learn the language of math. 
Know your angles. ... 
Know your triangles. ... 
Figure out what you want and what you're given. ...
Now fill in the rest.
 
        
             
        
        
        
Range is all the values of y, in this case, y can be any number, so the range is all real numbers.
        
             
        
        
        
45/x =15/100
Cross multiply
15x=4500
Divide both sides by 15
X=300
300 total cars on parking lot