Question

What is the distance between the points (5, 1) and (-3, -5)?

2sqrt5
2sqrt10
10
4sqrt5

Answer 1

The answer is 10
D= square root (-3-5)^2+ (-5-1)^2
D= square root-8^2+-6^2
D=square root 64 + 36
D=square root 100
D=10

Answer 2

Use this formula:
Distance = Square Root ( (X difference)^2 + (Y difference)^2 )

Distance = Square Root (5 - -3)^2 + (1 - -5)^2
Distance = Square Root  (64 + 36)
Distance = 10