exam Maths Puzzle Numerical Ability

Simplify

y to 0 power x -8power/x -7power z((y 5power)-2power/(z 0 power)9 - x 11power/y 4power)

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exam Other Question

Given a regular pentagon with radii and an apothem drawn, prove that the apothem bisects the vertex angle of the isoceles triangle formed by the radii.

I tried proving the two Please help me to solve 3x-y<6
x>1
y<3 graphically
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