PLEASE HELP! To measure the width of a sinkhole on his property, Harmon marked off congruent triangles as shown as in the diagram. How does he know that the lengths of A'B' and AB are equal?
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step-by-step explanation:

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the answer is 2/54

step-by-step explanation:

answer is b

step-by-step explanation:

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answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

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mrb