exam Maths Puzzle Numerical Ability

Please help me solve these equation:

a) sqrt(x-1=3)

b) sqrt(x^3=8)

c)^3sqrt(x^2=4)

(2)for function y= 1/x-1 give the (y) values for x= -2,-1,0,1,2,3

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How do you find suface area given:side length=8 slant height=9 and base sides=3 What is the inequality of {{{ 10-2p>12 and 7p<4p+9 }}}