exam Maths Puzzle Numerical Ability

Help please, I just can not figure out what do do here. This is number 2 I need help with and grealy apprieciate all help. It says to graph the inequality on a plane. Thank you. Gr

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exam Other Question

If a^2+b^2 = 7ab, show that log a+b/3=1/2 (loga + logb) Could you please check this one?

-1/20(5Z-4W)-6(-1/30-6/24Z) I get 2/5W..is this correct??
Thanks!