exam Maths Puzzle Numerical Ability

From a worksheet.
An investment advisor invested $25,000 into two simple interest accounts. One investment earned 12.5% annual simple interest; the other investment earned 13.9%

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exam Other Question

Simplify

a

DIVIDED BY

b + 1/1 + c/x

f(x)=-x^+4x-3




Graph y=f(x)

Show x-and y-intercepts and vertex on the graph

I actually thought y was f(x) from how it was explained in class, where am I off on this?