exam Maths Puzzle Numerical Ability

What are the coordinates of the apex of:

(f*g)(x) if f(x)=x^2+4 and g(x)=x-3

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exam Other Question

Can someone please help me with this one? Are the two lines with equations 2x + 3y = 8 and 3x + 2y = 7 parallel, perpendicular or neither? Tell (algebraically) how you know. Simplify the expression 13[6 to the 2nd power divided by (5to the 2nd power minus 4 to the 2nd power) +9]