WILL FAN AND MEDAL FOR HELP ON QUESTIONS!!!!!

- anonymous

WILL FAN AND MEDAL FOR HELP ON QUESTIONS!!!!!

- schrodinger

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- anonymous

what are the questions? :/

- anonymous

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- anonymous

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## More answers

- anonymous

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- anonymous

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- anonymous

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- anonymous

- anonymous

thats alot. lol

- anonymous

can you help me on some @YouDontKnowMeOo ?

- anonymous

you got to post one at a time lol

- anonymous

is it too small?

- anonymous

just zoom in on the page to make it bigger

- anonymous

- anonymous

- anonymous

each queation is susposed to have it's own thing

- anonymous

question*

- pooja195

Its own post.

- anonymous

ok

- anonymous

ill make a new one and tag you in it

- anonymous

Which question are we solving ? :)

- anonymous

the first

- anonymous

Alright

- anonymous

So coefficients means the number in front of the 'x'
So just look in front of those 'x' values :)

- anonymous

C? 5,2,-4

- anonymous

5x^2 + 2x - 4
What do you think the coefficients are?

- anonymous

yes !
You are correct ^^

- anonymous

Thanks what about the next question

- anonymous

Except for (-4) because there is no pro numeral following the coefficient (-4)

- anonymous

ok

- anonymous

Okay so we have: 7x^2 - x -2 - (-6x^3 + 3)

- anonymous

In this scenario, we just have to expand and simplify, just be careful of that minus ^^

- anonymous

okay

- anonymous

can you walk me through it?

- anonymous

Okay sure ^^

- anonymous

Firstly, I would expand -(-6x^3 + 3 ) first

- anonymous

okay

- anonymous

So we get something like: +6x^3 - 3

- anonymous

yep

- anonymous

Now just collect like terms :)

- anonymous

would you get rid of the plus sign?

- anonymous

yeah you can get rid of it, I just put it in there to show you that I have expanded the minus sign inwards ^^

- anonymous

wouldn;t it be +6x^3 +3 ?

- anonymous

Ah that's the thing
- (6x^3 + 3 = -6x^3 - 3

- anonymous

oh alright

- anonymous

Why?
What does - x + = ?
Remember these rules
- x - = +
- x + = -
+ x - = -
+ x + = +

- anonymous

yeah i know those

- anonymous

So have you resolve the question, by collecting the like terms?

- anonymous

would it be 3x^3 ?

- anonymous

How did you get 3x^3?

- anonymous

By simplifying the second part

- anonymous

I show you how I did it and just follow through my steps :)

- anonymous

okay

- anonymous

= 7x^2 - x - 2 - ( -6x^3 + 3 )
= 7x^2 - x - 2 + 6x^3 - 3
= 6x^3 + 7x^2 - x - 5

- anonymous

Is there anything you don't understand, please point it out ^^

- anonymous

ok i think i get it now

- anonymous

Okay no problem, just refer back to this previous example that we have do together to just briefly understand the concept :)
So next question?

- anonymous

yep

- anonymous

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- anonymous

so you dont have to scroll back up

- anonymous

Okay cool

- anonymous

So in this question 15), we are dealing with powers, ideally 10's

- anonymous

So what do you think 2.3 x 10^1 = ?

- anonymous

do we add the powers of ten?

- anonymous

In this case, we are multiplying by powers of ten's

- anonymous

and add the regular numbers?

- anonymous

ok

- anonymous

There isn't much adding going on in Q15) its all multiplying :)

- anonymous

would the answer be 9.3â€¢ 10^7 or 9.3â€¢10^6

- anonymous

hmm... would you like to try again, that answer seems way off :D

- anonymous

here
2.3 x 10^ 1 = ?

- anonymous

ok

- anonymous

We'll break it down

- anonymous

they aren't like terms thought

- anonymous

|dw:1433512805819:dw|

- anonymous

As we multiply by 10^1
We are moving the decimal point across to the right -> Hence it is moving to make the number bigger

- anonymous

none of the answers would match that.

- anonymous

i think i was right before, thats how my teacher taught me how to do it.

- anonymous

Are you allowed to use calculators?

- anonymous

yes

- anonymous

Ah okay, that makes things much more simpler XD

- anonymous

i think your supposed to multiply 2.3 and 7 and multiply the powers of ten

- anonymous

would the answer be a

- anonymous

Just type in the calculator as it is displayed
(2.3 x 10^1)(7 x 10^6) = 161000000

- anonymous

am i right?

- anonymous

well no to be honest, i think you may have interpreted the question wrong perhaps...

- anonymous

what do you think it is?

- anonymous

The value is 1.61 x 10^7

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