All together, Dion and Trevor worked a total of 38 hours last week. If Dion worked d hours, which expression represents the number of hours Trevor worked?

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godlovesme · Answer

options?

anonymous · Answer

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anonymous · Answer

38 + D
38 - d
38/d
38+d
-------
     2

mathstudent55 · Answer

Let's say 
Dion worked d hours, and 
Trevor worked t hours.
Then the total both worked is
d + t
We know the total they worked is 38, so we know
d + t = 38
Now we want to know how many hours Trevor worked, so we need to find what t is equal to.
We solve
d + t = 38 for t.
We subtract d from both sides to isolate t, and we get:
  d + t = 38
-d               - d
----------------
        t = 38 - d