find the distansce between each pair of points (1,5), (3,1)?

Question

express answers in simplest radical form and as decimal approximations rounded to the nearest hundredth if necessary

Answer 1

d = √(1 - 5)^2 + (3 - 1)^2
d = √(16 + 4)
d = √20 = 2√5 = 4.4721

Answer 2

You only have one pair of points. The distance between them is sqr( (3-1)^2 + (1-5)^2)
= sqr ( 2^2 + (-4)^2)
=sqr(4+16)
=sqr(20)= 2 sqr(5)
or approx 4.47