exam Maths Puzzle Numerical Ability

wk6

Problem #1

Simplify

radical one fifth

Problem #2

Simplify

2 radical (12) + 4 radical (27)


Problem #3
Simplify

(7 + radical (5)) ( 7 - radical (5) )

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exam Other Question
Solving inequalities with absolute values

I need an example of this and a way to solve it.
thank you plot the graph of the equations 2x +4y = 10 and 3x + 6y =12 and interpret the result.