The equation represents the area, A, of a rectangle, in square units.
A=x² - x - 6

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Step-by-step explanation:

nolos

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11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2