(1) 3|x^2 - 4| = y - 2euro wrote:What is the value of y?
(1) 3|x^2 - 4| = y - 2
(2) |3 - y| = 11
[spoiler](C)[/spoiler]
Y value varies for different values of x.
for exaple: when x=0, y = 14
and when x=2, y=2
hence INSUFF
(2) |3 - y| = 11
3-y = 11
implies y=-8
3-y=-11
implies y=14
2 different values. Hence INSUFF
Combining:
y can only be either -8 or 14 as per stmt2. Let us substitute in stmt1.
When y=-8,
3*|x^2-4| = -8-2 = -10
modulus is always positive.
Hence 3*mod is also positive.
Hence it cannot equal -10
So, y cannot be -8
When y=14,
3*|x^2-4| = 14-2 = 12
|x^2-4|=4
positive = positive
We are not concerened about values of X. So we need not simplify it further.
Hence Suff
pick C.
Hope this helps!!
