An art test has 15 questions. a student answers 80% correctly.
2 answers:
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There are two solutions.
.. (3, 2)
.. (0.2, -3.6)
_____
If you're choosing possibilities from a list, trying them in the equations usually gives quick results.
.. (3, 2)
.. (0.2, -3.6)
_____
If you're choosing possibilities from a list, trying them in the equations usually gives quick results.
4 friends evenly dividing up a n - slice pizza
So each one get slices of pizza.
For example, if n = 12 slice then each friend gets 12/4 = 3 pieces. If Harris ate one slice less then he ate =3 -1 = 2 pieces.
So the general expression for slices of pizza did Harris eat is