Answer:
28375683nxjs8737trxniu89oiec8n23783287 doo doo
Step-by-step explanation:
 
        
             
        
        
        
Recall that a slope-intercept form of a linear equation is

Rearrange the given so that it follows that slope intercept form

The y-intercept is the value for which the linear function crosses the y-axis, this is when the value of x is equal to zero. The ordered pair therefore of the y-intercept is (0,-1).
 
        
             
        
        
        
Let us denote the number of tiles by 

.
In the first store, if Darin bought 

 tiles, he would need to spend:                        

 (measured in $)
In the second store, if Darin bought 

 tiles, he would need to spend:                        

 (measured in $)
For the cost to be the same at both stores, it means (measured in $)                                           

Moving 

 over to the left hand side and changing signs:                                            
 
                                             
                                             
                                            
 tiles
Let's check. If he buys 60 tiles in the first store, he spends:
                              $0.79×60 + $24 = $47.40 + $24 = $71.40
If he buys 60 tiles in the second store, he spends:
                                               $1.19×60 = $71.40
∴
 Darin needs to buy 60 tiles for the cost to be the same at both stores.