What to do when you can't remember a formula for a word problem?

  1. How do you reason it out? I get confused on problems that involve distance rate and time. What wording should I look for to tell me if s should be positive and the number should be negative or any variation in between? Should there never be a negative involving a DRT formula?
     
  2. jcsd
  3. phinds

    phinds 8,347
    Gold Member

    what often works is just do math that makes the units work out right.
     
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