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Mathematics 15 Online
OpenStudy (geekfromthefutur):

Plz help. I will give medal and fan

OpenStudy (geekfromthefutur):

OpenStudy (igreen):

School has (x + 3) classes Number of students in each class = 4 more than the number of classes in each school Therefore: Number of students in each class = 4 + (x + 3)

OpenStudy (igreen):

Each student has (x + 1) pencils.

OpenStudy (geekfromthefutur):

ok

OpenStudy (igreen):

Write an expression that shows: Total number of pencils distributed by the company in 'x' schools.

OpenStudy (geekfromthefutur):

(x + 1) = 4 + (x + 3)

OpenStudy (geekfromthefutur):

Thats probably wrong

OpenStudy (geekfromthefutur):

But to me i think its right

OpenStudy (igreen):

No, it's going to be: (x + 3) + 4 = x + 7 Cause x + 3 + 4 = x + 7

OpenStudy (geekfromthefutur):

Well i almost had it lol

OpenStudy (igreen):

What does x(x + 3) represent? Look at the 'x' before it, what did it say 'x' represented?

OpenStudy (anonymous):

yo igreen can you help me as soon is i post a question

OpenStudy (geekfromthefutur):

x= the number of schools x+ 3 number of classes

OpenStudy (igreen):

I'll try, but in the future just tag me using the @ symbol.

OpenStudy (anonymous):

k

OpenStudy (igreen):

Yep so: x = Schools x + 3 = Classes So what does x(x + 3) represent?

OpenStudy (geekfromthefutur):

Number of school classes

OpenStudy (igreen):

Lol, don't you mean the number of classes in a school?

OpenStudy (geekfromthefutur):

Yea

OpenStudy (igreen):

Well, that's correct. Now do you know what the degree of a Polynomial is? And do you know what the classification of a Polynomial is?

OpenStudy (igreen):

@geekfromthefutur

OpenStudy (geekfromthefutur):

Yes basiccally like 2xy 1 + 1=2 or 5 ^ 2 + 7 ^5 2+ 5=7

OpenStudy (igreen):

Okay..well can you expand the polynomial? x(x + 3)? You just have to multiply x to all terms in the parenthesis..

OpenStudy (geekfromthefutur):

Ok

OpenStudy (igreen):

What do you get? Can you tell me: x * x = x * 3 =

OpenStudy (geekfromthefutur):

idk lol

OpenStudy (igreen):

\(x * x = x^2\) \(x * 3 = 3x\)

OpenStudy (geekfromthefutur):

OOOOOOHHHHH

OpenStudy (igreen):

Therefore: \(x(x+3) = x^2 + 3x\)

OpenStudy (geekfromthefutur):

well ik that for the 2nd one but idk that for the first one.

OpenStudy (igreen):

So what's the degree and classification of \(x^2 + 3x\)?

OpenStudy (igreen):

Degree: Highest Exponent Classification: 1 term = Monomial 2 terms = Binomial 3 terms = Trinomial 4 or more terms = Polynomial

OpenStudy (geekfromthefutur):

2 terms?

OpenStudy (igreen):

Yep, so it's a Binomial, and what's the degree?

OpenStudy (geekfromthefutur):

2

OpenStudy (igreen):

Example: x^3 + 2x^2 + 3 There are 3 exponents: x^3 = exponent of 3 x^2 = exponent of 2 3 = exponent of 1 So the highest exponent is 3, which means the degree is a 3rd degree.

OpenStudy (igreen):

Yes, so that means this is a 2nd degree Binomial.

OpenStudy (geekfromthefutur):

u soo smart : P

OpenStudy (igreen):

Lol, thanks. Do you need help with Part C too?

OpenStudy (geekfromthefutur):

I think i got it

OpenStudy (geekfromthefutur):

just divide was what i was going to say

OpenStudy (anonymous):

@iGreen you seem like you are very good at explaining lol

OpenStudy (igreen):

Lol, thanks. @mcnabkt

OpenStudy (anonymous):

welcome :D

OpenStudy (geekfromthefutur):

Thx for the help @iGreen

OpenStudy (igreen):

No problem.

OpenStudy (anonymous):

@iGreen are you good at radicals?

OpenStudy (igreen):

No, xD It's my worst subject in math.

OpenStudy (anonymous):

WHAT really? well thats okay :d

OpenStudy (anonymous):

@geekfromthefutur what about you?

OpenStudy (geekfromthefutur):

Yea im some what good.

OpenStudy (anonymous):

well okay i need some help with them lol

OpenStudy (anonymous):

i just need to know ?=10 x sqrt of 36 which is what time 10 equals 36? irdk what multiplys to that :p

OpenStudy (anonymous):

is it 2?

OpenStudy (igreen):

Oh, this is easy, I can do this.. What's the square root of 36?

OpenStudy (anonymous):

like can i just divide it backwards? and 6 but it has to be 10 times blank equals 36

OpenStudy (igreen):

So is this the question? \(10 \times~? = \sqrt{36}\)

OpenStudy (geekfromthefutur):

@iGreen what do i divide for part C i forgot about that part of it. Lol

OpenStudy (anonymous):

well i divided it and got 2 but thats really off :/ hmm idk let me see

OpenStudy (anonymous):

i really dont know everything goes up to 100 something when i multiply a number not 36 thats impossible

OpenStudy (igreen):

Well you can put 'x' for the blank and solve for it. \(10 \times x = \sqrt{36}\) We can combine 10 and x: \(10x = \sqrt{36}\) You said the square root of 36 is 6. So we can put that in: \(10x = 6\) Now we can divide 10 to both sides: \(x = \dfrac{6}{10}\) Simplify \(\dfrac{6}{10}\): \(\dfrac{6}{10} = \dfrac{3}{5}\)

OpenStudy (igreen):

Is 3/5 one of your choices?

OpenStudy (igreen):

@mcnabkt

OpenStudy (geekfromthefutur):

@iGreen What do I divide for part C is it the number of classes?

OpenStudy (anonymous):

umm is a free choice it doesnt tell you the choices im doing alg. online for a class

OpenStudy (igreen):

@geekfromthefutur Hold on.

OpenStudy (igreen):

@mcnabkt Can you take a printscreen of your question?

OpenStudy (anonymous):

no cause my thing doesnt let me do that lol

OpenStudy (igreen):

You can take a printscreen no matter what..are you using a desktop computer or a laptop?

OpenStudy (geekfromthefutur):

Regardless search on windows 8 snipping tool or desktop hit start and go to search program and put snipping tool

OpenStudy (anonymous):

yeah but idk, and nvm i was just suppose to multiply them lol i got it

OpenStudy (anonymous):

OH okay i just never really used it

OpenStudy (geekfromthefutur):

lol its easy 2 use i use it all the time

OpenStudy (anonymous):

well, im on a desktop and idk im not very technology oriented well sorta just not some things lol, im just good at figuring out how to fix things and what not, i cant see the obvious hidden objects on here lol i take the long way

OpenStudy (geekfromthefutur):

Lol

OpenStudy (igreen):

@geekfromthefutur You're going to multiply: \(x(x+3)[(x+3)+4]\) Simplify: \(x(x+3)[(x+7)]\) We already simplified x(x+3), let's plug that in too: \((x^2 + 3x)(x+7)\) Okay, can you multiply those?

OpenStudy (anonymous):

hey i like to use my brain sometimes, gosh.... and you know theress a way to bring up your previous tab after you close it? its like idk i think you press shift something, something lol

OpenStudy (igreen):

Yep, I do it all the time. CTRL + SHIFT + T That's what you press to reopen a closed tab. Or you can just right click any tab and click 'reopen closed tab'.

OpenStudy (geekfromthefutur):

3 * 7?

OpenStudy (igreen):

You'll be multiplying: \(x^2 * x =\) \(x^2 * 7 =\) \(3x * x =\) and \(3x * 7 =\)

OpenStudy (anonymous):

oh well..... let me have my smart moment lol

OpenStudy (geekfromthefutur):

Well I know \[x^2 + x= x^3\]

OpenStudy (igreen):

Don't you mean: \(x^2 * x = x^3\)? You can't add \(x^2 + x\).

OpenStudy (geekfromthefutur):

Yea

OpenStudy (geekfromthefutur):

lol

OpenStudy (anonymous):

i need help!

OpenStudy (anonymous):

48=8 x sqrt?

OpenStudy (geekfromthefutur):

21x is the 3x * 7

OpenStudy (igreen):

You got it. @geekfromthefutur

OpenStudy (igreen):

\(48 = 8 \cdot \sqrt?\) We know that 8 * 6 = 48, so the square root has to equal 6. Square roots are created by multiplying numbers by themselves. So 6 * 6 = 36. Therefore, the square root of 36 is 6. \(48 = 8 \cdot \sqrt{36}\) \(48 = 8 \cdot 6\) \(48 = 48\)

OpenStudy (anonymous):

yeah but i put that and it said it was wrong let me try it again!

OpenStudy (igreen):

@mcnabkt You have to put down 36.

OpenStudy (geekfromthefutur):

yea i got it now

OpenStudy (anonymous):

yeah it just said i was suppose to do 8 x sqrt 36 idk

OpenStudy (anonymous):

whatever you said lol

OpenStudy (igreen):

@geekfromthefutur \(x^2 * x = x^3\) \(x^2 * 7 = 7x^2\) \(3x * x = 3x^2\) \(3x * 7 = 21x\) So we have: \(x^3 + 7x^2 + 3x^2 + 21x\) Simplify: \(x^3 + 10x^2 + 21x\) So that's the number of students in the school.

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