Posted by Quinton on Monday, September 10, 2012 at 10:18am.
Please help with the translation of this algebraic expression: Twenty-seven more than a number and the sum of twenty-seven and a number, what is the difference between the two? Thank you!
Math - Steve, Monday, September 10, 2012 at 11:21am
difference is zero
"more than" means "added to" or "sum", so the two expressions mean the same thing
Now, if the two "a number" are not the same, then we have
difference is (x+27)-(y+27) = x-y, or the difference between the two numbers
Math - Quinton, Monday, September 10, 2012 at 12:30pm
wouldn't "the sum of twenty-seven and a number" be equivalent to 27 + y
Math - Steve, Monday, September 10, 2012 at 2:15pm
yes, if the number is "y"
Math - Steve, Monday, September 10, 2012 at 2:16pm
hmm. "sum" is addition, which is commutative.
That means that 27+y = y+27
Your suggestion is good, in that it follows the wording of the problem, but the value is the same as y+27.
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