Find the distance between the points A (4 , -5) and B ( -6 , -7)

Class : 7
Subject : Optional Mathematics

I know
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How do you find the distance of each number from the mean

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.