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25.02.2020 •
Mathematics
A lamp illuminates an area that is 12 feet diagonally at an angle of 40° from the ground to the top of the lamp.
Note: picture not drawn to scale
Which equation can be used to find the horizontal length, r, of the illuminated area?
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Ответ:
Cos40' = r/12 ft
Step-by-step explanation:
Ответ:
d.
Step-by-step explanation:
1) to re-write the given equation from 2y=4x-6 into y=2x-3, then
2) to find the equation like y=2x±... among the a/b/c/d: it is d. y=2x+14. Then
3) to check the given point (-3;8) of the y=2x+14; ⇒ 8=8.
4) correct answer is d. y=2x+14.