document.write( "Question 1067268: Suppose you have 16 coins that equal at least $2.20. Some coins are quarters and some are nickels. What is the greatest amount of nickels you can have? \n" ); document.write( "

Algebra.Com's Answer #682498 by MathTherapy(10556) $\"\"$ $\"About$

You can put this solution on YOUR website!
Suppose you have 16 coins that equal at least $2.20. Some coins are quarters and some are nickels. What is the greatest amount of nickels you can have?
\n" ); document.write( "

Let number of quarters, and nickels be Q and N, respectively
\n" );
document.write( "Then we have: 			
\n" );
document.write( "			
\n" );
document.write( " ------- Multiplying by 20			
\n" );
document.write( " ------- (1)			\r
\n" );
document.write( "\n" );
document.write( "Also, we have: Q + N = 16_____Q = 16 - N			
\n" );
document.write( " ------- Substituting 16 - N for Q in (1)	
\n" );
document.write( " ------- Multiplying by LCD, 5	
\n" );
document.write( "
\n" );
document.write( "N, or 
\n" );
document.write( "Therefore, the GREATEST number of nickels is: 9 \n" );
document.write( "

\n" );