A student solved the following problem and made an error:

In which line did the student make the first mistake?
A.Line 2
B.Line 5
C.Line 3
D.Line 4

Question

A student solved the following problem and made an error:

In which line did the student make the first mistake?
A.Line 2
B.Line 5
C.Line 3
D.Line 4

anonymous · Answer

attachment

anonymous · Answer

attachment

texaschic101 · Answer

are you trying to find the distance between points A and B ??

anonymous · Answer

yes but there is a mistake copying the figure over

texaschic101 · Answer

(2,4)....x1 = 2 and y1 = 4
(0,2)...x2 = 0 and y2 = 2

d = sq rt (x2 - x1)^2 + (y2 - y1)^2
d = sq rt (0 - 2)^2 + (2 - 4)^2
d = sq rt -2^2 + (-2^2)
d = sq rt 4 + 4
d = sq rt 8

idk...if he is looking for the distance between points A and B, he did it correctly.
Unless he is looking for the distance between some other points