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izzy0627
29.01.2020 •
Mathematics
Will give a flight of stairs is supported by two columns as shown. what is the distance from the base of the stairs to the tallest column?
a) 6 feet
b) 8 feet
c) 12 feet
d) 16 feet
e) 20 feet
Solved
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Ответ:
Let the distance of the base of the stairs to the tallest column be d.
Because matching sides of similar triangles are in the same ratio,
4 / 6 = d / (6 + 12)
4 / 6 = d / 18
(4 * 18) / 6 = d
d = 12
The answer is C
Ответ:
3 cos((x - π ) - 4 = 3 cos(x) - 4 since cos(x-π) = cos(x)
-1 ≤ cos(x) ≤ 1
-3 ≤ 3cos(x) ≤ 3
-3-4 ≤ 3 cos(x)-4 ≤ 3-4
-7 ≤ 3 cos(x) ≤ -1
The range is -7 to -1 so the midpoint is (-7-1)/2 = -4
y = -4 is the equation of the midline
Step-by-step explanation:
there you go