document.write( "Question 825615: Diane has $2.24 in pennies and nickels. she has three times as many nickels as pennies. how many pennies and how many nickels does she have? \n" ); document.write( "

Algebra.Com's Answer #497449 by TimothyLamb(4379) $\"\"$ $\"About$

You can put this solution on YOUR website!
---
\n" ); document.write( "x = pennies
\n" ); document.write( "y = nickels
\n" ); document.write( "---
\n" ); document.write( "x + 5y = 224
\n" ); document.write( "y = 3x
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "x + 5y = 224
\n" ); document.write( "3x - y = 0
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above linear system in standard form into this matrix-method solver:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = pennies = 14
\n" ); document.write( "y = nickels = 42
\n" ); document.write( "---
\n" ); document.write( "system matrix
\n" ); document.write( "1 5
\n" ); document.write( "3 -1
\n" ); document.write( "---
\n" ); document.write( "inverse of system matrix
\n" ); document.write( "0.0625 0.3125
\n" ); document.write( "0.1875 -0.0625
\n" ); document.write( "---
\n" ); document.write( "determinant of system matrix = -16
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations up to 4-equations 4-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "

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