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Hey I'm a calc tutor, and it's been so long since I've had algebra I was ashamed to be confused by a matrix problem. I don't know how to make the big brackets, but it looked somet

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The price of gasoline has increased by 5% during the past month, if the price per gallon a month ago was a $1.20 what is the current price per gallon now what are these types of problems called, and how do you do them. Are their ny links you can refer me too. 5^(6-x) or like 5^(x/3) things of this nature and some more complex. thanks