Caleb spends $68.50 on 50 hamburgers for the marching band. If single burgers cost $1.00 each and double burgers cost $1.50 each, how many double burgers did he buy?  Choose one:
A) 5
B) 10
C) 37
D) 40
E) 45
Solution -   Lets say, Single hamburgersxand Double hamburgersy   Given that,   x+y=50 and 1x+1.5y=68.50. By solving the equations y=37. ANS 37.
<result>C</result>
Caleb spends $68.50 on 50 hamburgers for the marching band. If single burgers cost $1.00 each and double burgers cost $1.50 each, how many double burgers did he buy?