<PRE><B>Question 174599</B>
an ice cream stand sells single dip cones for $1.75 and double dip cones for 2.25. Yesterday, 500 cones were sold for $930. how many single dip cones and how many double dip cones were sold?
---------
Quantity Equation: 
s + d = 500
Value Equation:
175s + 225d = 93000
------------------------
Rearrange for elimination:
175s + 175d = 175*500
175s + 225d = 93000
-------------
Subtract the 1st from the 2nd to get:
50d = 93000-175*500
d = 110 (# of double-dip cones sold)
Since s+d = 500, s = 390 (# of single-dip cones sold)
====================
Cheers,
Stan H.</PRE>