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lorraneb31
01.07.2021 •
Mathematics
From a window 30.0 ft above the street, the angle of elevation to the top of the building across the street is ° and the angle of depression to the base of this building is °. Find the height of the building across the street.
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Ответ:
First, let's ignore b (-7) because we're going to find that later.
A perpendicular line to y = 4x + b is y = -1/4x + b.
Alright, so now let's plug in the values. They are in the form of (x,y), so let's plug them in accordingly.
3 = -1/4(4) + b
3 = -1 + b
b = 4
y = -1/4x + 4
So a line perpendicular to y = 4x - 7 is y = -1/4x + 4.