What is the maximum number of relative extrema contained in the graph of this function? f(x)=3x^4-x^2+4x-2

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Im so bad at fractions they are not my best math thing to work on