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)
A. 6
B. 72 SQARE ROOT 2
C. 72
D. 3 SQUARE ROOT 10

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exam Other Question

The area of the rectangle is 2(3x-2)/x-1 Find the width. can you please help me in these solution I really i appriciated thank you

1) Multiply: [(1/4)z + (1/3)][(1/4)z - (1/5)]

2)Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3
thank you so much