document.write( "Question 132131: An investor buys 3 types of stock (A,B, and C) for a total price of $2750. Stock A costs $3.00 per share and both stocks B and C cost $2.50 per share. The investor buys a combined 600 shares of A and B. A combined 900 shares of A and C are bought. How many shares of each stock were bought? \n" ); document.write( "
Algebra.Com's Answer #96528 by stanbon(75887)\"\" \"About 
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An investor buys 3 types of stock (A,B, and C) for a total price of $2750. Stock A costs $3.00 per share and both stocks B and C cost $2.50 per share.
\n" ); document.write( "The investor buys a combined 600 shares of A and B.
\n" ); document.write( "A combined 900 shares of A and C are bought.
\n" ); document.write( "How many shares of each stock were bought?
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\n" ); document.write( "Value equation:
\n" ); document.write( "3a + 2.5b + 2.5c = 2750
\n" ); document.write( "a + b + 0 = 600
\n" ); document.write( "a + 0 c = 900
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\n" ); document.write( "Using The TI-83 Matrix function I get:
\n" ); document.write( "a = 500 (# of A stocks sold)
\n" ); document.write( "b = 100 (# of B stocks sold)
\n" ); document.write( "c = 400 (# of C stocks sold)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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