-8/x = 4
-8 = 4x
-8/4 = x
-2 = x
or
x = -2
The greatest amount is 45 and they would have bought 3 boxes
Rule: second differences are 2.
Selection C is appropriate.
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First differences are the sequence of differences of the given numbers:
.. 3 -8 = -5
.. 0 -3 = -3
.. -1 -0 = -1
.. 0 -(-1) = 1
Second differences are the sequence of differences of these:
.. -3 -(-5) = 2
.. -1 -(-3) = 2
.. 1 -(-1) = 2
All of these are 2, so the sequence can be described by a *second* order polynomial (because *second* differences are a non-zero constant).
When right ing mad you need to esprss it
