- #1

- 10

- 0

a. 43/11

b.-3

c.-65/22

d.5

e.3

The answer is E.

Explanation given in book:

- distance = abs(12(m) + 5(2m) -1) / root(144+25) = 5.

>>> m=3 or -32/11

I do not understand this explanation (of course finding m from the equation provided in the explanation is no problem, but I don't know how this equation was set up). Could you please help me out?