And can you also show the work too

A. Five behind the line.  

Step-by-step explanation:

We can use a number line (see below) to solve this problem.

Start at 0.

Jump eight units to the right.

Then jump in succession six, four, and nine units to the left.

Finally, jump six units to the right.

You end up five units to the left of zero (five squares behind the line).

Mathematically,

0 + 8 - 6 – 4 - 9 + 6 = -5

50- 250 is correct i did that one too

step-by-step explanation:

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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