exam Maths Puzzle Numerical Ability

perform the multiplication then simplify each radical expression

/13 x /5

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exam Other Question

Bryden got a job as a traffic helicopter pilot. She finds that with a tailwind, a 120km distance takes 45 minutes, but that the return trip (into the wind) takes 1 hour. What is the speed of the helicopter? What is the speed of the wind? I am suppose to add and express in the simplest form.

x-13/x^2-x-12 + 3x-3/x^2-x-12

Could you tell me if I have this correct I got: 4 / x - 4

Is this correct? Thank you for your help.