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← Money Left - College Algebra

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Showing Revision 2 created 05/25/2016 by Udacity Robot.

  1. So we know that grant started off with a
    certain amount of money from the venture
  2. capital funders. But then he doesn't just
    keep it, he starts to spend it. This means
  3. that the right choice must take both of
    these into account, the money that he was
  4. given initially and the money that he
    spent so far. The second and last choices
  5. only have one of these two things each, so
    that means that neither of them can be
  6. right. So I'm going to cross them both
    out. So that just leaves us with these
  7. two. Money from funders plus money spent,
    or money from funders minus money spent.
  8. Spending money, actually takes away from
    the amount of money that we have. It
  9. doesn't add to it. So that means that the
    third choice, right here, money from
  10. funders minus money spent must be the
    right answer. Now without even trying
  11. we've actually just done some math. I know
    that there aren't any numbers here, but
  12. what we've created is called an equation.
    It's called that because of this equal
  13. sign right here in the middle. Over doing
    with this equation is showing that these
  14. two quantities, the one on the left side
    of the equal sign and the one on the right
  15. side. Are equal to each other, or have the
    same numerical value. This is the first of
  16. many, many equations that we're going to
    look at throughout this course. And over
  17. time you'll learn to do a ton of different
    things with them.