Question: Where is the y2? Please be more specific!
Answer:
A.

Negative reciprocal gives you the perpendicular slope so negative reciprocal of 1/2 is -2.
Then apply point-slope form.
B. The answer is x = 6.
The midpoint of JK is

The line that goes through JK is just a horizontal line
because the y-coordinate does not change. So its perpendicular bisector is the vertical line that goes through the x-coordinate of the midpoint, that is,
.
Regroup terms
2(x + 2) = 1
Divided both sides by 2
x + 2 = 1/2
Subtract 2 from both sides
x = 1/2 - 2
Simplify 1/2 - 2 to -3/2
<u>x = -3/2</u>
There are 2/8 in 1/4 and 5/10 in 1/2
The number of letters is 26 in the English alphabet.
The number of digits from 0 ... 9 is 10
Therefore he can create 26 * 10 = 260 different passwords. <<<< Answer