document.write( "Question 971529: Trevor tutors French for $15 and hour and scoops ice cream for $10 an hour. He is going to work 15 hours this week. At least how many hours does he need to tutor to make more than $180? Let x equal the number of hours he tutors and y be the number of hours he scoops ice cream.\r
\n" ); document.write( "\n" ); document.write( "Atlas how many hours does Trevor need to tutor to make more then $180? \n" ); document.write( "

Algebra.Com's Answer #594037 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+15x+%2B+10y+%3E+180+\"$
\n" ); document.write( " $\"+x+%2B+y++=+15+\"$
\n" ); document.write( " $\"+y+=+15+-+x+\"$
\n" ); document.write( "----------------
\n" ); document.write( "by substitution:
\n" ); document.write( " $\"+15x+%2B+10%2A%28+15+-+x+%29+%3E+180+\"$
\n" ); document.write( " $\"+15x+%2B+150+-+10x+%3E+180+\"$
\n" ); document.write( " $\"+5x+%3E+30+\"$
\n" ); document.write( " $\"+x+%3E+6+\"$
\n" ); document.write( "He needs to tutor more than 6 hrs
\n" ); document.write( "----------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+y+=+15+-+x+\"$
\n" ); document.write( " $\"+y+=+15+-+6+\"$
\n" ); document.write( " $\"+y+=+9+\"$
\n" ); document.write( " $\"+15x+%2B+10y+%3E+180+\"$
\n" ); document.write( " $\"+15x+%2B+10%2A9+%3E+180+\"$
\n" ); document.write( " $\"+15x+%3E+90+\"$
\n" ); document.write( " $\"+x+%3E+6+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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