exam Maths Puzzle Numerical Ability

I can not figure out these I am having problems

Find the distance between (7,-2) and (-5,3)


and

Find the distance between (-3,-2) and (1,4)

thank you

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exam Other Question

Find the product or quotient. Write the answer using exponents.

31. b^4 x b

Any help with this problem would be GREATLY</b> appreciated:)
write a story problem that can be solved using the equation:
18.50 / 0.5 = x