X + Y = 12
X * Y = 45
Find X in terms of Y from the first equation:
X = 12 - Y
Substitute for X in the second equation:
X * Y = 45,
(12-Y) * Y = 45.
then solve for Y.
2007-11-19 08:14:31
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answer #1
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answered by Anonymous
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You could do it the algebra way, but for this problem game logic may be easier. The algebra way is to set the two equations a+b=12 and ab=45 up as a system of equations and solve by substitution. The other way is to make a list of numbers that add up to 12. (Since the sum and the product are positive, you know there will be no negative numbers or zeros). So, 1+11, 2+10, 3+9, 4+8, 5+7, 6+6 are your choices. None multiply to get 45.
Whether I do this by algebra or the other way, the answer doesn't exist. Did smart guy figure out the right question?
2007-11-19 16:15:14
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answer #2
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answered by wayfaroutthere 7
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You start with the 45--must be a 5, right? You then subtract 5 from 12 and voila, the answer.
2007-11-19 16:10:22
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answer #3
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answered by Anna P 7
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7+5=12
9*5=45
Methinks the Question is Wrong!!!!!
2007-11-19 16:14:56
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answer #4
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answered by Anonymous
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Last time I checked 7x5 = 35, not 45.
2007-11-19 16:14:32
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answer #5
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answered by Anonymous
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