document.write( "Question 269837: linda's cell phone bill is bill is $30 per month plus 5 cents for every minute over 300 minutes. last month she paid $31 for her cell phone usage. how many minutes did she use? \n" ); document.write( "

Algebra.Com's Answer #197691 by drk(1908) $\"\"$ $\"About$

You can put this solution on YOUR website!
The bill is
\n" ); document.write( " $\"b+=+30+%2B+.05%28m-300%29\"$
\n" ); document.write( "b = 31 so we get
\n" ); document.write( " $\"31+=+30+%2B+.05%28m-300%29\"$
\n" ); document.write( "distribute to get
\n" ); document.write( " $\"31+=+30+%2B+.05m+-+15\"$
\n" ); document.write( "combine like terms to get
\n" ); document.write( " $\"31+=+15+%2B.05m\"$
\n" ); document.write( "subtract 15 to get
\n" ); document.write( " $\"16+=+.05m\"$
\n" ); document.write( "divide to get
\n" ); document.write( " $\"320+=+m\"$
\n" ); document.write( "She used 320 minutes \n" ); document.write( "

\n" );