exam Maths Puzzle Numerical Ability

Help I cant figure these out. Please break it down for me so i can understand the process for solving. Thanks.


1. Simplify and evaluate:


(x7y-4z0/5-2x3y-8z-9)2

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exam Other Question

Given a kite with diagonals 6 and 14, find, to the nearest tenth, the length of the segment joining the midpoints of two opposite sides. How do I do a linear equation of

a+d=100
1.00a+1.50=120

can you give me the steps to do so.