Question

I need help using the distance formula.

Answer 1

My two points are (5,2) and (2,-2). The formula is d = sqrt of (x2 - x1) + (y2 - y1). But as my answer I got 3.16?

Answer 2

Remember that you have to raise (x2 - x1) and (y2-y1) to the power of 2.
The distance formula is \(\sqrt {(x2-x1)^2 + (y2-y1)^2}\).

Answer 3

Oh ok now I see my mistake. Let me try that again.

Answer 4

Its really the difference of the x's squared. So from 5 to 2 the difference is 3 so 3 squared is 9 + the difference of y's squared 4 square is 16 so 9 +16 square root is 5.

Answer 5

let me show you

Answer 6

difference of x is -3....squared is 9
difference of y is -7....squared is 49
49 + 9 = 58
sqrt 58 is 7.61 but that isn't an option?

Answer 7

Ok never mind my first point was (5,1) not (5,2)...

Answer 8

no teh difference from -2 to 2 is 4

Answer 9

I keep getting it wrong. This was my last try:
(5, 1) (2, 2)
difference of x = 3 squared is 9
difference of y = 1 squared is 1
9 + 1 = 10
sqrt 10 = 3.16

my choices are
4.24
4.83
5.75
6.09
Heres the picture. They ask for length of line BC

Answer 10

the points should be (5,1) and (2,-2)

Answer 11

difference in x = 3 3^2=9
difference in y = 3 3^2=9
so whats \(\sqrt{18}=?\)

Answer 12

4.24 (: Thank you so much! I have to look at the questions more carefully..