exam Maths Puzzle Numerical Ability

write a story problem that can be solved using the equation:
18.50 / 0.5 = x

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exam Other Question

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 can someone check this for me?

(x-10)(x+9)
=x^2-1x-90