exam Maths Puzzle Numerical Ability

I would love to get help with the problem below. Thank you very very much!

18+sqrt567
___________
9

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exam Other Question

Hey guys,

I really need help with them. I've been within my text, on the internet, and I can't find an example of how to do this problem.

Simplify the formula..

1 Mike drove 135 miles in 2.5 hours. Sam drove 91 miles in 1.75 hours. Who drives
at the faster speed?
I am not totally sure about how to do this one either. Do I divide each one of the miles to one of the hours?