exam Maths Puzzle Numerical Ability

CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:

FIND THE DISTANCE BETWEEN THE PAIR OF POINTS.
(-2,-6) and (7,-3)

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exam Other Question

I need help with this problem. Find the value of x: log base x 169/9=2
Thank you for your help. A circular saw has a diameter of 18cm and 22 teeth. What is the spacing between teeth?