Complete the statements about simplifying this expression:

the variable __ can be entirely eliminated by applying the identity property of multiplication.

the numerator of the rational expression in simplest form is

the denominator of the rational expression in simplest form is

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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let

step

find the slope of the line ab

we know that

the formula to calculate the slope between two points is equal to

substitute the values

step

find the equation of the line ab with the slope m and point a

we know that

the equation of the line in the slope-point form is equal to

substitute the values

convert to function form

let

therefore

the answer is the option

see the attached figure to better understand the problem