document.write( "Question 430055: One concert ticket costs $90. For each addl ticket sold to the group, the price of all tickets is reduced by $3. So 2 tickets costs 2x84 = $174, etc. Write a quadratic function that gives the total cost, C, of buying x tickets. \n" ); document.write( "

Algebra.Com's Answer #298635 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
In words:
\n" ); document.write( "Cost = ( cost of 1 ticket minus [$3 x (extra tickets)] x total number of tickets
\n" ); document.write( " $\"+C+=+%2890+-+3%2A%28x-1%29%29%2Ax+\"$
\n" ); document.write( " $\"+C+=+%2890+-+3x+%2B+3%29%2Ax+\"$
\n" ); document.write( " $\"+C+=+90x+-+3x%5E2+%2B+3x+\"$
\n" ); document.write( " $\"+C+=+-3x%5E2+%2B+93x+\"$
\n" ); document.write( "check answer:
\n" ); document.write( "For 2 tickets:
\n" ); document.write( " $\"+C+=+-3%2A4+%2B+93%2A2+\"$
\n" ); document.write( " $\"+C+=+-12+%2B+186+\"$
\n" ); document.write( " $\"+C+=+174+\"$
\n" ); document.write( "OK
\n" ); document.write( "Notice that for 30 tickets, The total cost is only $90 \n" ); document.write( "

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