document.write( "Question 139510: 3. An investor bought 500 shares of stock , some at $ 3.50 per share and some at $6.00 per share. If the total cost was $ 2187.50, how many shares of each stock did the investor buy?
\n" ); document.write( "(a) How will you set up the problem?
\n" ); document.write( "(b) What is the equation in terms of the variables?
\n" ); document.write( "(c) Which shares are more?
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Algebra.Com's Answer #101741 by stanbon(75887)\"\" \"About 
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An investor bought 500 shares of stock , some at $ 3.50 per share and some at $6.00 per share. If the total cost was $ 2187.50, how many shares of each stock did the investor buy?
\n" ); document.write( "(a) How will you set up the problem?
\n" ); document.write( "Let # of 3.50 shares be \"x\" ; value is 3.5x dollars
\n" ); document.write( "# of 6.00 shares is \"500-x\" ; value is 6(500-x)=3000-6x dollars
\n" ); document.write( "EQUATION:
\n" ); document.write( "value = value = 2187.50
\n" ); document.write( "3.5x + 3000-6x = 2187.5
\n" ); document.write( "-2.5x = -812.5
\n" ); document.write( "x = 325 (# of 3.50 shares)
\n" ); document.write( "500-x = 175 (# of 6.00 shares)
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\n" ); document.write( "(b) What is the equation in terms of the variables?
\n" ); document.write( "(c) Which shares are more?
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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