i need some one to show me step by step how to do this /4c-2/, c= -3 it's Absolute value

- 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

- chestercat

See more answers at brainly.com

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.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

plug in -3 for c, what do you get?

- Sup_open~study

let me see :)

- Sup_open~study

-14
?

Looking for something else?

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

## More answers

- Sup_open~study

is that right ?

- anonymous

right, the value of the expression inside the absolute value is -14. But, what does absolute value mean?

- anonymous

examples of absolute value
|x|=x
|-z|=z
|100|=100
|-345|=345
etc etc etc

- Sup_open~study

i'm sorry an you explain more

- anonymous

Do you know the definition of absolute value?

- Sup_open~study

i'm sorry i don't

- Sup_open~study

:(

- 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

o ok so the "-3" is just a 3 and not a "-3 " so the answer would be 14

- anonymous

You are half right...

- anonymous

Let's back up...

- anonymous

"-3" is still -3. That doesn't change. The problem says that c = -3. So, c = -3

- anonymous

But, the problem says that you have to find /4c-2/ when c = -3

- 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

o ok thanks man were did you get the ? /-12-/ + /-14? ?

- anonymous

Where did I get -12???

- Sup_open~study

yeah :)

- anonymous

-12 is the product of 4 and -3

- anonymous

When you plug in -3 for c, you multiply 4 x -3

- Sup_open~study

o i see now wow xD thanks man for all of your help

- 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

ok awesome man thanks i will do :)

- Hero

|4c - 2|
Do you know how to use the shift button @teic85?

- anonymous

No, how does that work?

- Hero

Hold down the shift button when pressing the \ key

- anonymous

Oh I see, I was simply using the same notation as "sup"

- anonymous

Thanks for pointing that out, though :)

- Hero

Hold down the shift button when trying to post || absolute value symbols

- anonymous

Like this?
|4c-2|

- Hero

Precisely

- anonymous

Thanks!

- anonymous

Isn't there a keyboard shortcut for superscript too? Might come in handy for exponents

- Sup_open~study

i am stuck on this one -/-10-z,/z
=-3

- Sup_open~study

:(

- Sup_open~study

i got 30

- Sup_open~study

but i think it is wrong

- anonymous

Ok, rewrite the expression after plugging in z = -3

- anonymous

Also, use |, it's the key above the enter key. You must use the shift key

- Sup_open~study

-/10 (-3)/
like that ??

- anonymous

Nope, you are using /. Press shift and \

- Hero

lol you're teaching people already @teic85

- anonymous

And no, the expression is missing a minus

- Sup_open~study

i no clue what the shift thing is lol xD

- anonymous

lol yes @Hero, that's the purpose of Open Study right? :D

- Sup_open~study

*have

- Sup_open~study

xD

- Hero

:D

- anonymous

haha ok, @Sup_open~study . Let's focus on the problem first.

- Sup_open~study

i think i am so post to - it and not x it ?

- anonymous

Correct, you have to subtract z not multiply
You wrote -/10 (-3)/
The original expression is -|-10-z|

- anonymous

Be careful, you also missed the negative in front of the 10

- Sup_open~study

o i see yeah i was writing it wrong xD

- anonymous

Rewrite the expression after plugging in -3 for z

- Sup_open~study

-/-10-3/ = 13 ?

- anonymous

z = -3, but the expression is -10 MINUS z.
So, it should be -10 - (-3) which is actually -10 + 3

- Sup_open~study

so it's 7 ??

- anonymous

What is 7?
You are jumping ahead... :)

- Sup_open~study

sorry xD

- anonymous

haha it's ok :)

- anonymous

When you plug in -3 for z, you get:
-|-10 - (-3)|

- anonymous

That look about right to you?

- Sup_open~study

yeah thanks :)

- anonymous

Ok, so we know that minus -3 is actually +3. So rewrite the entire expression with +3 in that spot

- Sup_open~study

ok so it's -|-10 - (3)|

- Sup_open~study

?

- anonymous

Not quite,
Minus -3 is +3. So, it is -|-10+3|

- anonymous

a negative and a negative make a positive

- Sup_open~study

o i see but how would i solve that ??

- 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

- 7 so it's just 7 ?

- anonymous

The absolute value of -7 is 7. Yes.

- Sup_open~study

o ok i see now but on the answer for the study guide he put -7 why not 7 ??

- anonymous

What's in front of the absolute value?

- Sup_open~study

i can't tell what you are looking for sorry but he had like a -1 -10 + -7 ?

- anonymous

This is the expression:
-|-10+3|. What is in front of the absolute value?

- Sup_open~study

a negative

- Sup_open~study

?

- anonymous

Right

- anonymous

So look at this...
|-7| = 7
What is -|-7| ?

- Sup_open~study

-7

- Sup_open~study

?

- anonymous

Since the negative sign is in front, it makes the expression negative. So -7 is the answer.

- anonymous

-|-7| is different than |-7|

- Sup_open~study

o so it's just 7

- anonymous

No, it isn't just 7.

- anonymous

The expression in your problem has a negative in front like this,
-|-7|

- Sup_open~study

yes

- 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

ok so when you have the - in front of the problem the answer is most likely going to be a - ???

- anonymous

Don't think "most likely". You'll get the wrong answer. That's just guessing.

- anonymous

Think about this...
what is -2(1 + 3) ?

- Sup_open~study

-8

- 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

o i see so when you change the answer to positive the negative will times it and that will make it an negative ?

- anonymous

Yes

- 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

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

I'm glad to help. Just be careful not to forget negatives. They matter a lot.

- Sup_open~study

yeah i know i got to keep on practicing those xD

- 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.