i need help with this problem. please show every step, because i am clueless, thx.
|1-y| is less than or equal to 2
|1-y| is less than or equal to 2
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|1-y| ≤ 2
IMPLIES
1 - y ≤ 2 and (-1)(1 - y) ≤ 2
Just like |x| implies -x & +x
1 - y ≤ 2
-y ≤ 1
y ≥ -1 (oh & don't forget, multiplying by a (-) number switches less/greater than sign)
(-1)(1 - y) ≤ 2
-1 + y ≤ 2
y ≤ 3
ANSWER --> -1≤ y ≤3
IMPLIES
1 - y ≤ 2 and (-1)(1 - y) ≤ 2
Just like |x| implies -x & +x
1 - y ≤ 2
-y ≤ 1
y ≥ -1 (oh & don't forget, multiplying by a (-) number switches less/greater than sign)
(-1)(1 - y) ≤ 2
-1 + y ≤ 2
y ≤ 3
ANSWER --> -1≤ y ≤3
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so how would i do this: |8x+2|= 14
would it be -14= 8x +2 = 14 ?
would it be -14= 8x +2 = 14 ?
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|1-y| <= 2
-2 <= 1 - y <= + 2..................Subt 1 from all three parts
-3 <= - y <= 1........................Divide all three parts by -1.....RTeverse the < sign
3 >= y >= -1..........................Write it in reverse order
-1 <= y <= 3.........ANSWER
Let me know if you want to learn all three cases for Absolute Value equations and inequalities.
Read below if you need an excellent math tutor
|1-y| is less than or equal to 2
Mathcerely,
Robert Jones.......Master in Mathematics (Un of Notre Dame)
"Teacher of Fine Students"
I tutor the struggling to improve grades and learning.
I tutor the very bright to make them faster, smarter, and
..........better looking like myself......Well first two are true.
If interested let me know how to get in touch. If not that is fine.
I tutor via skype.
-2 <= 1 - y <= + 2..................Subt 1 from all three parts
-3 <= - y <= 1........................Divide all three parts by -1.....RTeverse the < sign
3 >= y >= -1..........................Write it in reverse order
-1 <= y <= 3.........ANSWER
Let me know if you want to learn all three cases for Absolute Value equations and inequalities.
Read below if you need an excellent math tutor
|1-y| is less than or equal to 2
Mathcerely,
Robert Jones.......Master in Mathematics (Un of Notre Dame)
"Teacher of Fine Students"
I tutor the struggling to improve grades and learning.
I tutor the very bright to make them faster, smarter, and
..........better looking like myself......Well first two are true.
If interested let me know how to get in touch. If not that is fine.
I tutor via skype.
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-Break it down into 2 cases and remove the absolute value bars. so it would be 1-y is less than or equal to 2 *OR* 1-y is greater than or equal to -2 then find the value of y by adding 1 to each side (which eliminates 1 from the equation)
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i) I suppose you wish to solve the equation |1 - y| ≤ 2
ii) In the first case, let (1 - y) ≤ 2; ==> -y ≤ 1
==> y ≥ -1 [Multiplying by negative quantity, the inequality changes] ------- (1)
iii) Now let (1 - y) ≥ - 2; ==> -y ≥ -3
So, y ≤ 3 ----- (2)
Hence from (1) & (2), y in [-1, 3]
ii) In the first case, let (1 - y) ≤ 2; ==> -y ≤ 1
==> y ≥ -1 [Multiplying by negative quantity, the inequality changes] ------- (1)
iii) Now let (1 - y) ≥ - 2; ==> -y ≥ -3
So, y ≤ 3 ----- (2)
Hence from (1) & (2), y in [-1, 3]
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|1 - y| <= 2
This means that (1 - y) will be within a circle with radius of 2.
Or rather: http://www.wolframalpha.com/input/?i=%7C…
so:
-2 < 1 - y < 2
subtract 1:
-3 < -y < 1
multiply with -1 (and remember to change '<' to '>')
3 > y > -1
So you're left with:
-1 < y < 3
This means that (1 - y) will be within a circle with radius of 2.
Or rather: http://www.wolframalpha.com/input/?i=%7C…
so:
-2 < 1 - y < 2
subtract 1:
-3 < -y < 1
multiply with -1 (and remember to change '<' to '>')
3 > y > -1
So you're left with:
-1 < y < 3
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|1 - y| ≤ 2
-2 ≤ 1 - y ≤ 2
-2 - 1 ≤ -y ≤ 2 - 1
-3 ≤ -y ≤ 1
3 ≥ y ≥ -1
-2 ≤ 1 - y ≤ 2
-2 - 1 ≤ -y ≤ 2 - 1
-3 ≤ -y ≤ 1
3 ≥ y ≥ -1