exam Maths Puzzle Numerical Ability

Find f(-3) if f(x) = -2x^3-8x^2+2x-1

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exam Other Question

I HAVE $1.00 IN MY POCKET IT IS ALL IN COINS.
TOTAL COINS IS 50.
I HAVE 50 COINS IN MY POCKET WHICH IS EQUAL TO $1.00. WHAT IS THE BREAK DOWN OF COINS THAT I HAVE? HOW MANY OF EACH ? I have two problems i am unable to do can you help.
thanks
Problem 1 Graph the inequality.
y >=3x

Problem 2
Graph the inequality.
2x + 3y > 6