exam Maths Puzzle Numerical Ability

please help me with :

simplify

a^0 - 64/2^4 - (-3)^0 - 3^0 - 2[(-3-2^0) - (-3-2)]

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exam Other Question

I've been trying to solve an equation that carries 3 variables with three lines.

2/3x-1/6y+1/2z=11/2
5/6x+3/4y-1/12z+1/4=0
1/4x+5/6y=9/4-2/3z

I've turned this int Hi, I just asked for some help a little bit ago and I am stuck again. Here is my question... A supplier of electrical equipment offers a 10% discount for a cash purchase or a 5% d