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What famous saying is the result of Descartes’s doubt?

Which view of epistemology sees the primary source of knowledge to be reason?

Find the domain of x in the expression. 25-x2{“version”:”1.1″,”math”:”25-x2″}

Describe how the graph opens and determine the vertex of the graph of the quadratic function f(x)=(x-3)2-1{“version”:”1.1″,”math”:”f(x)=(x-3)2-1″}.

Find the domain of the function. f(x)=x+55+x{“version”:”1.1″,”math”:”f(x)=x+55+x”}

A function must be one-to-one to have an inverse function.

Find f(-2){“version”:”1.1″,”math”:”f(-2)”} given the piecewise function below. f(x)=9-x2,    x

Select the equation which has the given solutions. 2i, -2i{“version”:”1.1″,”math”:”2i, -2i”}

Multiply or find the special product. (x+4)(x+9){“version”:”1.1″,”math”:”(x+4)(x+9)”}   

BONUS QUESTION! Students that answer this question correctly will have 1 point added to their grade.   Methotrexate is an antimetabolite.  What do antimetabolites do?