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Posted by Anna on Monday, November 14, 2011 at 8:27pm.

Michael owns 300 shares of a certain stock. Suppose the price of the stock drops by \$4 per share. Write a multiplication equation to find the change in Michael's investment.

I put 300x(300x[-4]) is that right?

• Math-Help please? - Steve, Tuesday, November 15, 2011 at 10:47am

original value: 300x
new value: 300(x-4)

change = new-old = 300(x-4) - 300x = -1200

Makes sense, since each of 300 shares dropped in value by \$4.

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