Use the distance formula to find the length of the segment C(3,-4) to D(27,-11)
A.25
B.24
C.7
D.18

Question

Use the distance formula to find the length of the segment C(3,-4) to D(27,-11)
A.25
B.24
C.7
D.18

pfenn1 · Answer

Given the coordinates of two points, the distance D between the points is given by:
$$D ^{2}=dx ^{2}+dy ^{2}$$where dx is the difference between the x-coordinates of the points and dy is the difference between the y-coordinates of the points

anonymous · Answer

oh. i need to graph the coordinates in a graph paper huh?

pfenn1 · Answer

Well you could but$$dx=x _{1}-x_{2}, dy=y _{1}-y _{2}$$You can solve them from the two points you are given.

anonymous · Answer

oh. ok thanks again friend=)

pfenn1 · Answer

you're welcome.

anonymous · Answer

i got -24,7 but none of the answers has both?

pfenn1 · Answer

Look back to the first equation I gave you.  To find D
$$D ^{2}=dx ^{2}+dy ^{2}$$

pfenn1 · Answer

dx=-24, dy=7

anonymous · Answer

i got 576 + 49 and i got 625 and i used the metric caculator and i got 25 so a's my answer. thanks friend=)

pfenn1 · Answer

you're welcome