Question

Okay i need help!!!#1-4

Find the exact distance between A and B.
1. A(-4,0) B(4,6)
2.A(5,7) B(0,-5)
3.A(2,-1) B(1,-4)
4. A(-7,-2) B(0,7)

Answer 1

distance formula : sqrt ((x2 - x1)^2 + (y2 - y1)^2

1.) (-4,0).....x1 = -4 and y1 = 0
(4,6)......x2 = 4 and y2 = 6
now sub into the formula...
d = sqrt ((4 - (-4)^2 + (6 - 0)^2)
d = sqrt ((4 + 4)^2 + (6^2))
d = sqrt (8^2 + 6^2)
d = sqrt (64 + 36)
d = sqrt 100
d = 10 <=====

u would use the exact same formula for the rest of these problems
2.) (5,7),(0,-5)......distance is : 13
3.) (2,-1),(1,-4).....distance is : 3.16
4.) (-7,-2),(0,7).....distance = 11.4