find the distance between points P(7,4) and Q(1,2)to the nearest tenth

Answer 1

d^2 = (-2)^2 + (-6)^2
d^2 = 4 + 36
d^2 = 4 * 10
d = 2 sqrt 10

Answer 2

10, 14 and -8, 14

Answer 3

Find the distance between the line y = -x + 4 and the point P(-1,-1). Round to the nearest tenth.