document.write( "Question 175018: Can you please help me with the constraints on this linear programming question?\r
\n" ); document.write( "\n" ); document.write( "Trenton, Michigan, a small community, is trying to establish a public transportation system of large and small vans. It can spend no more than $100,000 for both sizes of vehicles and no more than $500 per month for maintenance. The community can purchase a small van for $10,000 and maintain it for $100 a month. The large vans cost $20,000 each and can be maintained for $75 per month. Each large van carries a maximum of 15 passengers, and each small van carries a maximum of 7 passengers.
\n" ); document.write( "

Algebra.Com's Answer #130119 by Mathtut(3670)\"\" \"About 
You can put this solution on YOUR website!
lets call the number of small vans and large vans purchased ,be S and L, respectively
\n" ); document.write( ":
\n" ); document.write( "\"10000S%2B20000L%3C=100000\"...eq 1 (for purchases)
\n" ); document.write( ":
\n" ); document.write( "\"100S%2B75L%3C=500\"...........eq 2(for maintanence)
\n" ); document.write( ":
\n" ); document.write( "divide equation 1 by 10000
\n" ); document.write( ":
\n" ); document.write( "\"s%2B2L%3C=10\" revised eq 1
\n" ); document.write( "\"s%3C=5-%283%2F4%29L\"revised eq 2
\n" ); document.write( ":
\n" ); document.write( "take s's value in eq 2 and plug it into eq 1
\n" ); document.write( ":
\n" ); document.write( "\"5-%283%2F4%29L%2B2L%3C=10\"
\n" ); document.write( ":
\n" ); document.write( "multiply all terms by 4
\n" ); document.write( ":
\n" ); document.write( "\"20-3L%2B8L%3C=40\"
\n" ); document.write( ":
\n" ); document.write( "\"5L%3C=20\"
\n" ); document.write( ":
\n" ); document.write( "\"highlight%28L%3C=4%29\"
\n" ); document.write( ":
\n" ); document.write( "\"highlight%28s%3C=5-%283%2F4%29L%3C=5-%283%2F4%29%284%29%3C=2%29\"
\n" ); document.write( ":
\n" ); document.write( "so if we purchase 4 Large vans and 2 small vans we can carry
\n" ); document.write( ":
\n" ); document.write( "4(15)+2(7)=74 passengers
\n" ); document.write( "
\n" );