anonymous
  • anonymous
Which expression is less than -(-I-4.2I)?
Mathematics
  • Stacey Warren - Expert brainly.com
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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.
chestercat
  • chestercat
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anonymous
  • anonymous
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
what is `I-4.2I` equal to?
anonymous
  • anonymous
"brain fart" i dont know...

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More answers

jim_thompson5910
  • jim_thompson5910
how far is -4.2 from 0 on the number line?
jim_thompson5910
  • jim_thompson5910
|dw:1442363852087:dw|
anonymous
  • anonymous
-4.2? or 4.2?
shreenithaa
  • shreenithaa
4.2 since the jumps are considered as positive
jim_thompson5910
  • jim_thompson5910
exactly as shreenithaa said the distance is never negative
jim_thompson5910
  • jim_thompson5910
it doesn't make sense to have the distance be say -20 miles
anonymous
  • anonymous
Yup. lol
jim_thompson5910
  • jim_thompson5910
so that is why `|-4.2| = 4.2`
jim_thompson5910
  • jim_thompson5910
the absolute value represents distance from 0 the absolute value result is never negative
shreenithaa
  • shreenithaa
maybe the "expression" is (there can be any but has to be less than the solution the problem above" 10.42/x
anonymous
  • anonymous
-(-4.2) I-4.2I I-(-4.2)I -I-(-4.2)I These are my possible answers.
shreenithaa
  • shreenithaa
why do u need the one at the end and it has to have a variable in order for it to be an expression
anonymous
  • anonymous
I have no idea?
anonymous
  • anonymous
I am just putting what it says in my study book.
shreenithaa
  • shreenithaa
now im confused????? :(
shreenithaa
  • shreenithaa
what grade r u in
anonymous
  • anonymous
11th.
shreenithaa
  • shreenithaa
then i wont understand i am in 8th no wonder why anyways just incase, what book do u have
anonymous
  • anonymous
Its an algebra II book.
shreenithaa
  • shreenithaa
i have algebra 1 maybe i dont have the answer sorry :(
anonymous
  • anonymous
Its fine:) thanks for trying!
shreenithaa
  • shreenithaa
ur welcome..
anonymous
  • anonymous
@jim_thompson5910 got anything?
shreenithaa
  • shreenithaa
i think i got something i searched up expression in google and this is what i got In mathematics, an expression (or mathematical expression) is a finite combination of symbols that is well-formed according to rules that depend on the context. Mathematical symbols can designate numbers (constants), variables, operations, functions, punctuation, grouping, and other aspects of logical syntax.
jim_thompson5910
  • jim_thompson5910
so what we did so far is compute that I-4.2I = 4.2 we can replace the entire `I-4.2I` with `4.2` so `-(-I-4.2I)` becomes `-(-4.2)` agreed?
anonymous
  • anonymous
Would that be the answer?
jim_thompson5910
  • jim_thompson5910
no we're working to evaluate what number `-(-I-4.2I)` is equal to. Don't worry about the final answer right now
anonymous
  • anonymous
Aren't we trying to find what is less?
anonymous
  • anonymous
Or do you want to find what is equal first?
jim_thompson5910
  • jim_thompson5910
well the first step is to figure out what number `-(-I-4.2I)` is equal to then we do the same with each answer choice once we get single numbers, we can do comparisons to see which is smaller
anonymous
  • anonymous
So its equal to 4.21? or? sorry I really suck at math.
jim_thompson5910
  • jim_thompson5910
hopefully you agree that |-4.2| = 4.2 and hopefully you see why `-(-I-4.2I)` becomes `-(-4.2)`
jim_thompson5910
  • jim_thompson5910
what would `-(-4.2)` turn into?
anonymous
  • anonymous
I do agree and see.
anonymous
  • anonymous
Wouldn't it be 4.2? or -4.2? It can't be negative right?
jim_thompson5910
  • jim_thompson5910
the two negatives cancel to form a positive
anonymous
  • anonymous
so 4.2
jim_thompson5910
  • jim_thompson5910
yes
jim_thompson5910
  • jim_thompson5910
in the end, `-(-I-4.2I)` boils down to the single number `4.2`
anonymous
  • anonymous
But there's three negatives? do they all cancel out eachother?
jim_thompson5910
  • jim_thompson5910
for each of these answer choices below -(-4.2) I-4.2I I-(-4.2)I -I-(-4.2)I you'll do the same thing: simplify as much as possible after simplification, you compare
jim_thompson5910
  • jim_thompson5910
but remember, I-4.2I turned into +4.2 or just 4.2
jim_thompson5910
  • jim_thompson5910
which is why we got to -(-4.2)
anonymous
  • anonymous
So I think the last one is the answer.
jim_thompson5910
  • jim_thompson5910
\[\Large -(-|-4.2|)\] \[\Large -(-\color{red}{|-4.2|})\] \[\Large -(-\color{red}{4.2})\]
jim_thompson5910
  • jim_thompson5910
`So I think the last one is the answer.` why do you think that?
anonymous
  • anonymous
I changed my mind.
anonymous
  • anonymous
For all the equations, you could simplify is pretty much to all the same thing. right?
jim_thompson5910
  • jim_thompson5910
let's go through all the choices choice A -(-4.2) simplifies to ???
anonymous
  • anonymous
4.2
jim_thompson5910
  • jim_thompson5910
choice B I-4.2I simplifies to ???
anonymous
  • anonymous
4.2
jim_thompson5910
  • jim_thompson5910
choice C I-(-4.2)I simplifies to ???
anonymous
  • anonymous
4.2
jim_thompson5910
  • jim_thompson5910
choice D -I-(-4.2)I simplifies to ???
anonymous
  • anonymous
-4.2?
jim_thompson5910
  • jim_thompson5910
good
anonymous
  • anonymous
Thats why I though it was the answer. It ends up being less?
jim_thompson5910
  • jim_thompson5910
so the problem boils down to this question: which number is less than 4.2? choice A) 4.2 choice B) 4.2 choice C) 4.2 choice D) -4.2
anonymous
  • anonymous
D:)
jim_thompson5910
  • jim_thompson5910
yes it's choice D. I just wanted to be sure you understand why it's D
anonymous
  • anonymous
I did! from the beginning. Just over thought, and said "wait no, I'll sound stupid"..
jim_thompson5910
  • jim_thompson5910
Don't worry about sounding stupid. Most often, you have the right answer on the first try. So go with your gut
anonymous
  • anonymous
Which I should of explained in the beginning. Because I just sounded super stupid lol
jim_thompson5910
  • jim_thompson5910
you did great

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