Verified Answer :

Formula for the Distance  between 2 points is √(x₂-x₁)²+(y₂-y₁)²

So the given points are (0,5)  0 is x₁  and 5 is y1
 in the 2nd given points (-5,0)  -5 is x₂  and 0 is y₂

Now we know what order the points go in so we place them into the formula which you have the following:  √(-5-0)²+(0-5)²
Next we work what is in the parentheses first
√(-5)²+(-5)²  now we work with exponents √25+25 next we add what's inside the square root symbol  √50 the square root of 50 on the calculator gives an answer of 7.07107

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