Question 1205255
<pre>
Small tables rent for $4 each. Large tables rent for $6 each.
You want to rent somewhere between 30 and 45 tables. But you
only want to spend $180.

The 4 says the cost to rent 1 small table is $4.
The 6 says the cost to rent 1 large table is $6. 
The 180 says you have $180 to spend to rent tables. 

You have 16 possibilities:

 1.  0 small tables at $4 each for   $0 and 30 large tables for $6 each for
$180. Total $180
 2.  3 small tables at $4 each for  $12 and 28 large tables for $6 each for
$168. Total $180
 3.  6 small tables at $4 each for  $24 and 26 large tables for $6 each for
$156. Total $180
 4.  9 small tables at $4 each for  $36 and 24 large tables for $6 each for
$144. Total $180
 5. 12 small tables at $4 each for  $48 and 22 large tables for $6 each for
$132. Total $180
 6. 15 small tables at $4 each for  $60 and 20 large tables for $6 each for
$120. Total $180
 7. 18 small tables at $4 each for  $72 and 18 large tables for $6 each for
$108. Total $180
 8. 21 small tables at $4 each for  $84 and 16 large tables for $6 each for
 $96. Total $180
 9. 24 small tables at $4 each for  $96 and 14 large tables for $6 each for  
 $84. Total $180
10. 27 small tables at $4 each for $108 and 12 large tables for $6 each for  
 $72. Total $180
11. 30 small tables at $4 each for $120 and 10 large tables for $6 each for  
 $60. Total $180
12. 33 small tables at $4 each for $132 and  8 large tables for $6 each for  
 $48. Total $180
13. 36 small tables at $4 each for $144 and  6 large tables for $6 each for  
 $36. Total $180
14. 39 small tables at $4 each for $156 and  4 large tables for $6 each for  
 $24. Total $180
15. 42 small tables at $4 each for $168 and  2 large tables for $6 each for  
 $12. Total $180
16. 45 small tables at $4 each for $180 and  0 large tables for $6 each for   
  $0. Total $180

You can take your pick of these 16 choices for spending your $180 to rent tables.  

Edwin</pre>