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Algebra 8 Online
OpenStudy (meganhall0517):

I need help with algebra please someone get back to me asap

OpenStudy (vjt):

what kind???

OpenStudy (meganhall0517):

do you want me to put a question to see if you can help me

OpenStudy (vjt):

yeah post it...

OpenStudy (meganhall0517):

ok 1 sec

OpenStudy (vjt):

are you able to just screenshot it??

OpenStudy (meganhall0517):

OpenStudy (meganhall0517):

OpenStudy (vjt):

do you have any guesses on any of them...i can't give you the straight answer as it is against the Code of Conduct

OpenStudy (meganhall0517):

can you walk me through how to do them

OpenStudy (vjt):

I don't know how to do all of them but I can walk through the ones that I know.

OpenStudy (meganhall0517):

OK

OpenStudy (vjt):

I'm going to start with #7 as it looks the easiest.

OpenStudy (vjt):

\[5x^2-3x-(-6)-9x^2-7x+(-4)\] What do you think is the first step for this equation?

OpenStudy (meganhall0517):

parenthesis

OpenStudy (vjt):

not in this case as the parenthesis are just there to separate the symbols and show which are negatives...for this whole equation we are combining like terms and we want to start from left to right. \[5x^2-9x^2\] would be your first step

OpenStudy (meganhall0517):

my calculator got me 0

OpenStudy (vjt):

if your using your calculator your equation would just be 5-9...as the x^2 isn't going to change.

OpenStudy (meganhall0517):

-4x*2

OpenStudy (vjt):

Yes, so now your new equation would be\[4x^2-3x-(-6)-7x+(-4)\]

OpenStudy (vjt):

do you have a guess on your next step since you are just combining like terms then.

OpenStudy (meganhall0517):

-6 and -4

OpenStudy (vjt):

oops sorry the equation is a -4x^2 at the beginning.... yes we could either do -3x-7x as our next step or -6+(-4) but you usually want to the equation from left to right...so do you know what -3x-7x is?

OpenStudy (meganhall0517):

-10x

OpenStudy (vjt):

yes

OpenStudy (vjt):

then how about -6+(-4)

OpenStudy (meganhall0517):

-10

OpenStudy (vjt):

yes that is correct...and then there is just one last step...put it all together

OpenStudy (vjt):

\[-4x^2-10x-10\]

OpenStudy (vjt):

That is your answer for #7 then.

OpenStudy (meganhall0517):

is it a

OpenStudy (vjt):

yes

OpenStudy (meganhall0517):

ok can you keep helping me your a good helper

OpenStudy (vjt):

okay we can work on #8 as that is another easy one...

OpenStudy (vjt):

can you list out factors of 9??? and list out factors of 12???

OpenStudy (vjt):

do you understand what I mean by that?

OpenStudy (meganhall0517):

the gcf is 3

OpenStudy (vjt):

yes that is right...but that isn't exactly what we are looking for....we are looking for just a list of numbers mainly... so for example factors of 9 are...3,9,18 and so on and for 12 some are...3,4,12,24 and so on probably missing a few factors there but that is the main idea there.

OpenStudy (meganhall0517):

oh ok

OpenStudy (meganhall0517):

so thats my answer?????

OpenStudy (vjt):

no they are asking what isn't a fraction that would be able to be factored like the numbers above.

OpenStudy (meganhall0517):

so how do i do that

OpenStudy (vjt):

ok let me try this a different way...looking at the answer choices, we'll start with the first one. \[18/24\] if you multiplied \[9/12 * 2/2\] it would equal that, which means this isn't our answer we don't want it to equal it.

OpenStudy (vjt):

do you have a guess on the next one??? \[3/4\] from 9/12 are you able to get to 3/4 in any way???

OpenStudy (meganhall0517):

yes

OpenStudy (vjt):

Yess that is correct, we can get to 3/4 from that by dividing by 3/3...so that isn't our answer... now our next option is 15/20 are you able to get to those number in any way (\[(+,-,*,/)\]

OpenStudy (meganhall0517):

no

OpenStudy (vjt):

correct, so that must be out answer.

OpenStudy (vjt):

http://prnt.sc/cnjo98

OpenStudy (meganhall0517):

is there anymore you know

OpenStudy (vjt):

i can do 3.... Your equation is \[-2ab\] and \[a=-4\] and \[b=6\] so all you need to do is plug in those numbers in the first equation to get your new equation...so you know what your new equation would be?

OpenStudy (meganhall0517):

2 x -4 x 6

OpenStudy (vjt):

close.... your new equation is\[-2-4(6)\] what is your first step?

OpenStudy (meganhall0517):

d

OpenStudy (vjt):

Yes!!

OpenStudy (meganhall0517):

YAY

OpenStudy (meganhall0517):

sorry that i am asking so many questions

OpenStudy (meganhall0517):

can someone still help me

OpenStudy (vjt):

we can do #5....do you have any guess on this

OpenStudy (meganhall0517):

umm let me see

OpenStudy (meganhall0517):

a doesnt

OpenStudy (vjt):

do you have your work?

OpenStudy (meganhall0517):

b does and yes

OpenStudy (vjt):

ok and yes B is correct.

OpenStudy (meganhall0517):

yay

OpenStudy (vjt):

those are mainly the ones that i know...i know more, but only like half-way

OpenStudy (sissyedgar):

I can help you with 6. but other than that one and the ones she already helped you with I don't know any more.

OpenStudy (meganhall0517):

ok

OpenStudy (sissyedgar):

For #6... First you have to figure out what -4 / -2 equals.

OpenStudy (meganhall0517):

2

OpenStudy (sissyedgar):

Correct! So now we have to try out all the other options till we figure out which one equals 2. A. - What is -2 * 1

OpenStudy (meganhall0517):

-2

OpenStudy (sissyedgar):

So A. can't be right. B. - What is -4 + 2?

OpenStudy (meganhall0517):

-2

OpenStudy (sissyedgar):

So it's not B either. C. - What is -4 - (-6)?

OpenStudy (meganhall0517):

2

OpenStudy (sissyedgar):

So the correct answer is C. ♥

OpenStudy (sissyedgar):

I can help you with 4 too! x)

OpenStudy (sissyedgar):

x = \[\frac{ 17 }{ 3 }\] Which is the same as \[17\div3\] So what is the 17/3?

OpenStudy (meganhall0517):

5.666666667

OpenStudy (sissyedgar):

Okay, soo since it would take forever to fit all the 6's in the chat i know you shortened it. But using the same amount of 6's that was already in your calculator. Miltiply it by 6.

OpenStudy (meganhall0517):

huh

OpenStudy (sissyedgar):

When you did 17/3 initially there were more 6's in the answer then you put in the above comment right?

OpenStudy (meganhall0517):

yes

OpenStudy (sissyedgar):

So if you have do 17/3 in your calculator again; leave that number in, but multiply it by 6.

OpenStudy (meganhall0517):

34

OpenStudy (sissyedgar):

+1

OpenStudy (meganhall0517):

35

OpenStudy (sissyedgar):

That's the answer! x)

OpenStudy (sissyedgar):

I don't know 2., 9., and 10. Sorry!

OpenStudy (sissyedgar):

Well, for 9... Divide the number by 3: 99/3 = 33 That's the middle number. The other two are just before or after. Answer: 31, 33, 35 You can also do this algebraically. Let x be the first odd number Let x + 2 be the second odd number Let x + 4 be the third odd number x + x+2 + x+4 = 99 3x + 6 = 99 3x = 93 x = 93/3 x = 31 If the smallest number is 31, the next two odd numbers are 33 and 35 respectively. Answer: 31, 33, 35 ( https://answers.yahoo.com/question/index?qid=20090115215136AAIDcOk)

OpenStudy (meganhall0517):

so what is the answer them

OpenStudy (sissyedgar):

2. and 10?

OpenStudy (meganhall0517):

oh 31

OpenStudy (sissyedgar):

Yep!

OpenStudy (sissyedgar):

I would guess 10 is A. but I really don't know. Sorry.. And I don't even have a assumption for 2.

OpenStudy (meganhall0517):

ok can you get someone to help me with 2 and 10

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