Sup_open~study
  • Sup_open~study
i need some one to show me step by step how to do this /4c-2/, c= -3 it's Absolute value
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
plug in -3 for c, what do you get?
Sup_open~study
  • Sup_open~study
let me see :)
Sup_open~study
  • Sup_open~study
-14 ?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

Sup_open~study
  • Sup_open~study
is that right ?
anonymous
  • anonymous
right, the value of the expression inside the absolute value is -14. But, what does absolute value mean?
anonymous
  • anonymous
examples of absolute value |x|=x |-z|=z |100|=100 |-345|=345 etc etc etc
Sup_open~study
  • Sup_open~study
i'm sorry an you explain more
anonymous
  • anonymous
Do you know the definition of absolute value?
Sup_open~study
  • Sup_open~study
i'm sorry i don't
Sup_open~study
  • Sup_open~study
:(
anonymous
  • anonymous
Absolute value is the numerical value of a number without considering the positive or negative sign. So, the absolute value of 10 is 10. The absolute value of -2 is 2. It is just the value of the number. It is always positive.
Sup_open~study
  • Sup_open~study
o ok so the "-3" is just a 3 and not a "-3 " so the answer would be 14
anonymous
  • anonymous
You are half right...
anonymous
  • anonymous
Let's back up...
anonymous
  • anonymous
"-3" is still -3. That doesn't change. The problem says that c = -3. So, c = -3
anonymous
  • anonymous
But, the problem says that you have to find /4c-2/ when c = -3
anonymous
  • anonymous
So, plug in -3 for c just like you did before, /4(-3)-2/ = /-12-2/ = /-14/ So, when you plug in -3 for c, the expression equals /-14/. But, the absolute value of -14 is 14.
Sup_open~study
  • Sup_open~study
o ok thanks man were did you get the ? /-12-/ + /-14? ?
anonymous
  • anonymous
Where did I get -12???
Sup_open~study
  • Sup_open~study
yeah :)
anonymous
  • anonymous
-12 is the product of 4 and -3
anonymous
  • anonymous
When you plug in -3 for c, you multiply 4 x -3
Sup_open~study
  • Sup_open~study
o i see now wow xD thanks man for all of your help
anonymous
  • anonymous
You're welcome. If you have time, try these to make sure you know how to do absolute values: Find /4c-2/ when c = 3 Find 4/c/-2 when c = -3 Find 4c - /-2/ when c = -3
Sup_open~study
  • Sup_open~study
ok awesome man thanks i will do :)
Hero
  • Hero
|4c - 2| Do you know how to use the shift button @teic85?
anonymous
  • anonymous
No, how does that work?
Hero
  • Hero
Hold down the shift button when pressing the \ key
anonymous
  • anonymous
Oh I see, I was simply using the same notation as "sup"
anonymous
  • anonymous
Thanks for pointing that out, though :)
Hero
  • Hero
Hold down the shift button when trying to post || absolute value symbols
anonymous
  • anonymous
Like this? |4c-2|
Hero
  • Hero
Precisely
anonymous
  • anonymous
Thanks!
anonymous
  • anonymous
Isn't there a keyboard shortcut for superscript too? Might come in handy for exponents
Sup_open~study
  • Sup_open~study
i am stuck on this one -/-10-z,/z =-3
Sup_open~study
  • Sup_open~study
:(
Sup_open~study
  • Sup_open~study
i got 30
Sup_open~study
  • Sup_open~study
but i think it is wrong
anonymous
  • anonymous
Ok, rewrite the expression after plugging in z = -3
anonymous
  • anonymous
Also, use |, it's the key above the enter key. You must use the shift key
Sup_open~study
  • Sup_open~study
-/10 (-3)/ like that ??
anonymous
  • anonymous
Nope, you are using /. Press shift and \
Hero
  • Hero
lol you're teaching people already @teic85
anonymous
  • anonymous
And no, the expression is missing a minus
Sup_open~study
  • Sup_open~study
i no clue what the shift thing is lol xD
anonymous
  • anonymous
lol yes @Hero, that's the purpose of Open Study right? :D
Sup_open~study
  • Sup_open~study
*have
Sup_open~study
  • Sup_open~study
xD
Hero
  • Hero
:D
anonymous
  • anonymous
haha ok, @Sup_open~study . Let's focus on the problem first.
Sup_open~study
  • Sup_open~study
i think i am so post to - it and not x it ?
anonymous
  • anonymous
Correct, you have to subtract z not multiply You wrote -/10 (-3)/ The original expression is -|-10-z|
anonymous
  • anonymous
Be careful, you also missed the negative in front of the 10
Sup_open~study
  • Sup_open~study
o i see yeah i was writing it wrong xD
anonymous
  • anonymous
Rewrite the expression after plugging in -3 for z
Sup_open~study
  • Sup_open~study
-/-10-3/ = 13 ?
anonymous
  • anonymous
z = -3, but the expression is -10 MINUS z. So, it should be -10 - (-3) which is actually -10 + 3
Sup_open~study
  • Sup_open~study
so it's 7 ??
anonymous
  • anonymous
What is 7? You are jumping ahead... :)
Sup_open~study
  • Sup_open~study
sorry xD
anonymous
  • anonymous
haha it's ok :)
anonymous
  • anonymous
When you plug in -3 for z, you get: -|-10 - (-3)|
anonymous
  • anonymous
That look about right to you?
Sup_open~study
  • Sup_open~study
yeah thanks :)
anonymous
  • anonymous
Ok, so we know that minus -3 is actually +3. So rewrite the entire expression with +3 in that spot
Sup_open~study
  • Sup_open~study
ok so it's -|-10 - (3)|
Sup_open~study
  • Sup_open~study
?
anonymous
  • anonymous
Not quite, Minus -3 is +3. So, it is -|-10+3|
anonymous
  • anonymous
a negative and a negative make a positive
Sup_open~study
  • Sup_open~study
o i see but how would i solve that ??
anonymous
  • anonymous
ok, well now that that pesky z is gone, we can just focus on what is inside the absolute value. What is -10 + 3?
Sup_open~study
  • Sup_open~study
- 7 so it's just 7 ?
anonymous
  • anonymous
The absolute value of -7 is 7. Yes.
Sup_open~study
  • Sup_open~study
o ok i see now but on the answer for the study guide he put -7 why not 7 ??
anonymous
  • anonymous
What's in front of the absolute value?
Sup_open~study
  • Sup_open~study
i can't tell what you are looking for sorry but he had like a -1 -10 + -7 ?
anonymous
  • anonymous
This is the expression: -|-10+3|. What is in front of the absolute value?
Sup_open~study
  • Sup_open~study
a negative
Sup_open~study
  • Sup_open~study
?
anonymous
  • anonymous
Right
anonymous
  • anonymous
So look at this... |-7| = 7 What is -|-7| ?
Sup_open~study
  • Sup_open~study
-7
Sup_open~study
  • Sup_open~study
?
anonymous
  • anonymous
Since the negative sign is in front, it makes the expression negative. So -7 is the answer.
anonymous
  • anonymous
-|-7| is different than |-7|
Sup_open~study
  • Sup_open~study
o so it's just 7
anonymous
  • anonymous
No, it isn't just 7.
anonymous
  • anonymous
The expression in your problem has a negative in front like this, -|-7|
Sup_open~study
  • Sup_open~study
yes
anonymous
  • anonymous
So, the absolute value of -7 is 7. But, then you have to add the final negative (the one in front). So, it's -7
Sup_open~study
  • Sup_open~study
ok so when you have the - in front of the problem the answer is most likely going to be a - ???
anonymous
  • anonymous
Don't think "most likely". You'll get the wrong answer. That's just guessing.
anonymous
  • anonymous
Think about this... what is -2(1 + 3) ?
Sup_open~study
  • Sup_open~study
-8
anonymous
  • anonymous
Right. The negative in front changes it to negative. So, when you have a positive number times a negative number you get a negative.
Sup_open~study
  • Sup_open~study
o i see so when you change the answer to positive the negative will times it and that will make it an negative ?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
The same is true for absolute values. The negative in front of -|-7| is like multiplying -1 times |-7| (what your teacher had in your notes)
Sup_open~study
  • Sup_open~study
o i see thanks man you have been a huge help i may have failed my test tomorrow if it was not for you
anonymous
  • anonymous
I'm glad to help. Just be careful not to forget negatives. They matter a lot.
Sup_open~study
  • Sup_open~study
yeah i know i got to keep on practicing those xD
anonymous
  • anonymous
Exactly. If you practice, you'll get more comfortable. Eventually, you'll be able to do it in your head :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.