exam Maths Puzzle Numerical Ability

SIMPLIFY EACH RADICAL ASSUME THAT ALL VARIABLES REPRESENT POSITIVE REAL NUMBERS

SQ ROOT OF 27 OVER 2+ THE SQ ROOT OF 3

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exam Other Question

Solve. Then Graph.

7x >_ 63 (The _ is supposed to be under the >)

Would the solution be {xlx<9} ?? AND
the graph be a hollow circle on the 9 and and arrow towards the numbers higher than 9? Am I even close?
can you help me solve

4x^2&#8805;13x-3

here is my answer: (-&#8734;,3)u (3,1)