exam Maths Puzzle Numerical Ability

graph all on a graph;
f(x)=log3x+2
f(x)=log3(x+2)
f(x)=log3(x-2)
f(x)=log3x

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exam Other Question

Converting 5184 cubic inches to cubic feet gives Graph 3x+4y=7 and 5x+2y=12. I know how to do this. The next part of the problem asks: Find the exact coordinates of their point of intersection, and check your answer by substitution in the given equations. How do you go about doing this ?