exam Maths Puzzle Numerical Ability

f(x)=-x2+3
2= squared (dont know how to do squared on the computer, sorry)

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exam Other Question

Hi, I am working on this problem and need help.
Barry the barrelmaker wants to make a cylindrical barrel that will contain exactly 100 cubic feet and use as little material as po
Complete the table of values and graph the line:
2x-y=6