(12n + 6)n = 180 (n - 2). Find n

n=12   n=5/2

Step-by-step explanation:

(12n + 6)n = 180 (n - 2)

Distribute

12n^2 +6n = 180n -360

Subtract 180 n from each side

12n^2 +6n - 180n = 180n-180n -360

12n^2 -174n =  -360

Add 360 to each side

12n^2 -174n+360 =360  -360

12n^2 -174n+360 =0

Divide by 6

12/6n^2 -174/6n+360/6 =0

2n^2 -29n +60 =0/6

2n^2 -29n +60 =0

Factor

(n - 12) (2 n - 5) = 0

Using the zero product property

n-12 =0   2n-5=0

n=12   2n=5

           n=5/2

what's the question?

step-by-step explanation:

there is no question.

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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