James is four years younger than Austin. If three times James' age is increased by the square of Austin's age, the result is 28.
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Therefore the number of students scoring above 96 is given by:
Therefore the number of students scoring above 96 is given by:
A sideways opening parabola is in the form 
, so we know from the process of elimination that it will either be b or c. Next we have to realize that if the parabola opens to the left it is a negative parabola, just like if a parabola opens upside down it is a negative parabola. So the one that has the negative out front is b.