Answer: The answer is 381.85 feet.
Step-by-step explanation: Given that a window is 20 feet above the ground. From there, the angle of elevation to the top of a building across the street is 78°, and the angle of depression to the base of the same building is 15°. We are to calculate the height of the building across the street.
This situation is framed very nicely in the attached figure, where
BG = 20 feet, ∠AWB = 78°, ∠WAB = WBG = 15° and AH = height of the bulding across the street = ?
From the right-angled triangle WGB, we have

and from the right-angled triangle WAB, we have'

Therefore, AH = AB + BH = h + GB = 361.85+20 = 381.85 feet.
Thus, the height of the building across the street is 381.85 feet.
7*7=49+5=54 just use PEMDAS
Answer:

Step-by-step explanation:
In order to find g we have to use the formula for finding the slope of the line passing through two points that's

where
(x1 , y1) and (x2 , y2) are the points
From the question the points are (g, -1) and (2, 5) and m = 3/2
We substitute it into the equation and find g
That's

We have the final answer as
<h3>g = - 2</h3>
Hope this helps you