What are the zeros of x2+5x-43=5x+6
2 answers:
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Answer:
The height of the window = x + 2 = 4.23 + 2= 6.23m
Step-by-step explanation:
The angle of elevation of the top of the house and the window is 60 and 45 degree.
We can proceed as drawing a diagram as a man of height 2m and a building of total height 12m.
- draw a horizontal line along the height of a man so that it touches building at height 2m
- till the window height we assume its height as 'x' from the man's height.
- distance till the top from the window will be 'y'
we don't know the distance between man and the building let it be 'b'
=1
x=b .............(1)
total height of the building is given as 12m
x + y + 2=12
x + y = 10 .....................(2)
= tan 60
x = ≈ 5.77m
y = 10 -
y= 10(1- ) ≈ 4.23m
The height of the window = x + 2 = 4.23 + 2= 6.23m