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Rational number word problem: checking account

Your checking account is overdrawn. Not good. Use your knowledge of decimals and adding negative and positive numbers to bring your account back into the black. Created by Sal Khan and Monterey Institute for Technology and Education.

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• Can't I just subtract 15.08 from 100.00, add 426.90, and get the same answer?
• Yes, and this is just because you have a list of positive and negative numbers that you are adding, you can always change the order when adding signed numbers.
• I love this math program, but I feel the videos are sometimes much easier than the practices.
• super video just I dont really know how he got that at ?
• Forget the fluff, think in terms of arithmetic, but use the \$ to complete the equation. -15.08 + 526.90. Start on right on the number line, -15.08 then add (mover left on the number line) 526.90. But the easiest way is to subtract -15.08 from 526.90 to get 511.82. The answer then is \$511.82.
• At , he uses a Kerala Marlboro line. How does that work?
• Well... he shows that you start out with less than 0. Before you can add the 526.90, you have to pay off your debt first. Hope this helps, like if you agree!
• Can someone help me out.
!.I don't know how to do this
2.What does rational mean?(JK)
• A rational number is one that can be written as a ratio. So if you have the number 8, that can be written as 8 over 1.
• why would he keep adding them up if he already has a - number
• if y=2x-3 what is y when y is 5 how do you go about fing the answer to this kind of problem
• Did you mean when y is 5, what is x?
In that case, plug 5 in for y, and get x by itself.
5=2x-3
Add 3 to both sides (moves -3)
8=2x
Divide both sides by two, and you get your answer of 4=x.
• At Sal mentions that Stewart has a negative amount of money in his account; how is that possible?

Is it because he's in debt?
• It is impossible to achieve a negative amount of money in your account unless you take something that isn't yours. So to answer your question, yes, it means he is in debt
• how do you go negative in your bank account