Let x represent the horizontal displacement of the top of the escalator from its bottom. The geometry of the problem and the Pythagorean theorem tell you
x² + 4.89² + 9.09² = 16.0²
x² = 149.4598
x ≈ 12.22 . . . meters
Then the tangent of the angle of interest is
tan(α) = (4.89 m)/(12.22 m)
α = arctan(4.89/12.22) ≈ 21.8°
The escalator is inclined 21.8° above the horizontal.
Hope this isn't to late 3x^3-6x^2-2x+2
First the common denominator has to be 6. So to get to 6 you multiply the 2 by 3 and the numerator by 3 giving 3 over 6 then you multiply 3 times 2 to get to 6 so the following fraction is 2 over 6. So when u add the two together it gives you 5 6ths
The answer is x = 9/13
Hope in helped