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01 Sep 2021, 03:30
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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:
5%
(low)
Question Stats:
81% (01:14) correct
19%
(00:53)
wrong
based on 124
sessions
History
Date
Time
Result
Not Attempted Yet
01 Sep 2021, 04:01
Kudos
Bookmarks
(1) x^2 + y = 17 – Two variables, NS.
(2) y = 2x + 2 – Two variables, NS.
Combining both statements :
Replacing value of Y in equation 1 from equation 2.
x2 + 2x + 2 = 17
x2 + 2x = 15
x(x+2) = 15
or
x = 15 and x = 13 (x+2 =15, x=13)
OA - "E"
(2) y = 2x + 2 – Two variables, NS.
Combining both statements :
Replacing value of Y in equation 1 from equation 2.
x2 + 2x + 2 = 17
x2 + 2x = 15
x(x+2) = 15
or
x = 15 and x = 13 (x+2 =15, x=13)
OA - "E"
01 Sep 2021, 04:12
Kudos
Bookmarks
What is x ?
(1) x^2 + y = 17
(2) y = 2x + 2
Statement-1
x^2+y= 17 (2 variables and 1 equation) Not Sufficient
Statement-2
y=2x+2 (2 variables and 1 equation) Not Sufficient
Combine
x^2+2x+2=17
x^2+2x-15=0
x^2+5x-3x-15=0
x=3, x=-5
so 2 values of x. Not Sufficient.
Answer is E.
(1) x^2 + y = 17
(2) y = 2x + 2
Statement-1
x^2+y= 17 (2 variables and 1 equation) Not Sufficient
Statement-2
y=2x+2 (2 variables and 1 equation) Not Sufficient
Combine
x^2+2x+2=17
x^2+2x-15=0
x^2+5x-3x-15=0
x=3, x=-5
so 2 values of x. Not Sufficient.
Answer is E.
