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25 Dec 2018, 08:20
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (01:16) correct
19%
(01:05)
wrong
based on 256
sessions
History
Date
Time
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Not Attempted Yet
In the figure above, x + y =
A. 40
B. 120
C. 140
D. 180
E. 220
Attachment:
2018-12-25_1917.png [ 10.49 KiB | Viewed 7455 times ]
31 Jul 2019, 08:51
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Bunuel
We know that the top angle must be 40°.
At the same time, let's call the other 2 angles a and b.
We know that a + b + 40 = 180 (since the 3 angles in a triangle must add to 180°)
Also, since angles on a line must add to 180°, we know that: a = 180-y and b = 180-x
We can now take a + b + 40 = 180 and replace a and b with their equivalent values.
We get: (180-y) + (180-x) + 40 = 180
Simplify: 400 - y - x = 180
Subtract 400 from both sides: -y - x = -220
Multiply both sides by -1 to get: x + y = 220
Answer: E
Cheers,
Brent
General Discussion
Archit3110
Major Poster
25 Dec 2018, 09:11
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Bunuel
we can say
40+180-y+180-x=180
x+y= 220
IMO E
