A Ladder that is 32 ft long leans against a building. The angle of elevation of the ladder is 70 degrees. To the nearest tenth o
f a foot how high off the ground is the top of the ladder? Explain.
A. 20.3 ft
B. 10.9 ft
C. 26.2 ft
D. 39.1 ft
A. 20.3 ft
B. 10.9 ft
C. 26.2 ft
D. 39.1 ft
1 answer:
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First find the equation of y.
Find the slope m.
.
Pick one point, I'll pick (-3, 9). Insert coordinates in equation then compute n.
.
The equation of a line y is:
.
The perpendicular line is same like the normal line except its slope m becomes:
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The equation of a perpendicular bisector is thus:
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Hope this helps.
Answer:
3 inches
Step-by-step explanation:
Lenght = 18 inches
Width =15 inches
Perimeter of the rectangular painting and frame = 90 inches
Let X be the width of the frame
The width of the framed picture = 15 + 2x
The length of the framed picture = 18 + 2x
Perimeter = 2 (L + W)
90 = 2(15 + 2x + 18+ 2x)
90 = 2(33 + 4x)
90 = 66 + 8x
8x = 90 - 66
8x = 24
x = 24/8
x = 3 inches
the width of the frame is 3 inches
