Question 763928: You are saving $100 a week to buy a new computer. Your brother is saving at a weekly rate of 10x-2, if x = the number of weeks of saving. In how many weeks will you both have equal amounts of money?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! You are saving $100 a week to buy a new computer. Your brother is saving at a weekly rate of 10x-2, if x = the number of weeks of saving. In how many weeks will you both have equal amounts of money?
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If 10x-2 is the rate, x(10x-2) is the amount of savings after x weeks.
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Equations:
x(10x-2) = 100
10x^2 -2x -100 = 0
5x^2 -x - 50 = 0
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x= 3.2639
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I doubt that is the right answer for your problem.
For that matter, I doubt that 10x-2 is a rate.
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Cheers,
Stan H.
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