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Question 1014647: if 3 boys have a total of $200 between them to go to a concert the tickets cost $30 each and each boy plans to buy a t shirt for t dollars. write 2 different expressions to represent the amount of money the 3 boys will have left over
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! let L equal how much is left over and let T equal the price of a t-shirt.
one equation would be L = 200 - 90 - 3T
the expression for how much money is left over would be 200 - 90 - 3T
this can be simplified to 110 - 3T.
that's really the same expression after it's been simplified.
not sure if that counts as different.
another expression might be 200 - 3 * 30 - 3T
they're all just different forms of the same expression though.
so .....
200 - 90 - 3T
200 - 3 * 30 - 3T
110 - 3T
another way might be 200 - (90 + 3T)
that's different, but still just another form of the same expression.
still another would be 200 - (3 * 30 + 3T)
i would go with 200 - 90 - 3T and 110 - 3T.
they look like different expressions even though they wind up giving you the same answer.
looking at 110 - 3T separately, though, you would have no idea that it came from 200 - 90 - 3T, unless you knew up front that's where it came from.
if you look at 200 - (90 + 3T), you could figure out that another form of that equation would be 200 - 90 - 3T without knowing that the other form was 200 - 90 - 3T.
so the one that is sufficiently different from the others is 110 - 3T.
i'd go with 200 - 90 - 3T and 110 - 3T.
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