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2 items are filed under this topic.
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A troublesome word problem |
2015-12-28 |
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From Linda:
James is now 3/5 John's age. Three years ago, he was 1/2 John's age. Three years from now, he will be 2/3 John's age.
How old are they now?
Answered by Penny Nom. |
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Explain why 3(x+2) = 3x+2 is incorrect |
2005-03-28 |
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From Cynthia:
An algebra student incorrectly used the distributive property and wrote 3(x+2) = 3x+2. How would you explain to him the correct result, without the use of the distributive law?
Explain why the square of the sum of two numbers is different from the sum of the squares of two numbers.
Answered by Penny Nom. |
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