What is the distance between R(4, –7) and S(10, 4)?
A.) √157 UN
B.) √127 UN
C.) √85 UN
D.) √45 UN

Question

What is the distance between R(4, –7) and S(10, 4)?
A.) √157 UN
B.) √127 UN
C.) √85 UN
D.) √45 UN

nnesha · Answer

$$\huge\rm x=\sqrt{{(x_2 - x_1})^2 +(y_2- y_1)^2}$$
distance formula 
(x_1,y_1)(x_2 ,y_2) plug x and y values into the formula

amistre64 · Answer

you forgot the formula ... this is why formulas are no good, and concepts are better

amistre64 · Answer

how are you going to find a distance if there is not formula :)

anonymous · Answer

I got 11/6

nnesha · Answer

11 "over" 6 ?
how did you get fraction ? :-)

amistre64 · Answer

if we move our line so that it starts at the origin (how?) R-R = 0 sooo

R(4, –7) and S(10, 4)
  -4 +7          -4 +7
-----------------
    0   0            6  11

now we have a right angle triangle with sides 6 and 11, the distance between them is pythagorean

sqrt(6^2 + 11^2)

amistre64 · Answer

i think crazy worked slope ....

anonymous · Answer

A?

nnesha · Answer

http://prntscr.com/722bcp that's how !t works

nnesha · Answer

and yes that's right

nnesha · Answer

|dw:1430887064757:dw|
1st) plug in #
2nd) solve parenthses
3rd) square 
4th)add
5th) square root 
6th ) done answer