exam Maths Puzzle Numerical Ability

wk6

Problem #4

Evaluate if possible

index 3 radical (-27)

Problem #5

Simplify

radical (7) * radical (14)

Problem #6

Simplify (45)

My answer: 3radical (5

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exam Other Question
What is the slope of the line that passes through (-4, -2) and the origin? is there more than one way to solve inequalities, perhaps a shortcut?
can you show me using an example?