document.write( "Question 809702: suppose you bought supplies for a party. Three rolls of streamers and fifteen party hats cost $30. Later, you bought two rolls of streamers and four party hats for $11. Write and solve a system of equations to determine the cost of streamers and party hats. find their costs. \n" ); document.write( "
Algebra.Com's Answer #487962 by TimothyLamb(4379)\"\" \"About 
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3s + 15h = 30
\n" ); document.write( "2s + 4h = 11
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\n" ); document.write( "3s + 15h = 30
\n" ); document.write( "s + 5h = 10
\n" ); document.write( "s = 10 - 5h
\n" ); document.write( "---
\n" ); document.write( "2s + 4h = 11
\n" ); document.write( "2(10 - 5h) + 4h = 11
\n" ); document.write( "20 - 10h + 4h = 11
\n" ); document.write( "9 = 6h
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\n" ); document.write( "h = $1.5
\n" ); document.write( "s = $2.5
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\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
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\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
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\n" ); document.write( "Convert fractions, decimals, and percents:
\n" ); document.write( "https://sooeet.com/math/fraction-decimal-percent.php
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\n" ); document.write( "Calculate and graph the linear regression of any data set:
\n" ); document.write( "https://sooeet.com/math/linear-regression.php \n" ); document.write( "
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