document.write( "Question 1159501: This is a solving a system of equations word problem using matrices !!
\n" );
document.write( "Suppose you bought supplies for a party. Three rolls of streamers and 15
\n" );
document.write( "party hats cost $30. Later, you bought 2 rolls of streamers and 4 party hats for
\n" );
document.write( "$11. How much did each roll of streamers cost? How much did each party hat
\n" );
document.write( "cost? \n" );
document.write( "
Algebra.Com's Answer #782548 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! 3S+15H=30 \n" ); document.write( "2S+4H=11 \n" ); document.write( "multiply top by -2 and bottom by 3 to eliminate S \n" ); document.write( "-6S-30H=-60 \n" ); document.write( "6S+12H=33 \n" ); document.write( "-18H=-27 \n" ); document.write( "H=$1.50 \n" ); document.write( "2S=$5 \n" ); document.write( "S=$2.50 substituting into second\r \n" ); document.write( "\n" ); document.write( "check in first $7.50+$22.50=$30.00\r \n" ); document.write( "\n" ); document.write( "Each hat cost $1.50 \n" ); document.write( " |