exam Maths Puzzle Numerical Ability

(4-√3)/(6+√y)

It says to rationalize the demoniator

Im having a little trouble with it

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exam Other Question

Can someone hlep me on this problem?

In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items
The amount of money Army Striegel collected in tips as a waitress in each of seven days $25, $60, $37,$48, $100,$140,$59. Find the mean, median, mode, and midrange.

Please help me solve!