Line m is perpendicular to line n. Which statement about lines m and n is true?

  see below

Step-by-step explanation:

Slopes of perpendicular lines are negative reciprocals of each other:

  m1 = -1/m2

  (m1)(m2) = -1

So, their product is -1.

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Additional comment

The rule above does not apply to horizontal and vertical lines, because the slope of a vertical line is undefined. In this problem, that is not an issue, because the lines are not aligned with the axes.

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0