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 September 9th, 2014, 09:05 AM #1 Newbie   Joined: Sep 2014 From: UK Posts: 7 Thanks: 0 Help with my homework Hi im having a lot of trouble with these questions. Can someone help me? ^ = power v = root / = divide 1) Simplify w^1/2 x w^3/2 / w 2) Find the gradient of a straight line which is parallel to the line 2x -6y = 5 3) Simplify (2 - v3)(2+v3) 4)Rationalise the denominator of 1/2v3. Give your answer in the form va/b where a and b are integers. 5)Solve 9/10-x + 9/10+x = 5 6) V is directly propotional to the cube of x. When x=3, V=54. Find a formula for V in terms of x.
 September 9th, 2014, 09:14 AM #2 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,594 Thanks: 1038 These are quite basic...have you been skipping math classes? Thanks from Math Message Board tutor
 September 9th, 2014, 09:18 AM #3 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs You will usually get help more promptly if you post no more than 2 questions per thread. Let's begin with the first one: $\displaystyle \frac{w^{\frac{1}{2}}\cdot w^{\frac{3}{2}}}{w}=w^{\frac{1}{2}}\cdot w^{\frac{3}{2}}\cdot w^{-1}$ Now, add the exponents...what do you get?
September 9th, 2014, 09:25 AM   #4
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Quote:
 Originally Posted by Denis These are quite basic...have you been skipping math classes?
I'm 16. I from England, im starting a level's and this is my summer work. I need this by tomorrow because they might kick me out of the course if I wont do it... So its kinda important but i can't do these myself. If they are easy for then please help me...

Quote:
 You will usually get help more promptly if you post no more than 2 questions per thread. Let's begin with the first one: w12⋅w32w=w12⋅w32⋅w−1 Now, add the exponents...what do you get?
I have no idea how to do these, I barely got into the a level with a B grade at GCSE...

Last edited by ONEnONLY; September 9th, 2014 at 09:33 AM.

September 9th, 2014, 09:32 AM   #5
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Quote:
 Originally Posted by MarkFL You will usually get help more promptly if you post no more than 2 questions per thread. Let's begin with the first one: $\displaystyle \frac{w^{\frac{1}{2}}\cdot w^{\frac{3}{2}}}{w}=w^{\frac{1}{2}}\cdot w^{\frac{3}{2}}\cdot w^{-1}$ Now, add the exponents...what do you get?
Are you suggesting that i should make 3 threads?

September 9th, 2014, 09:39 AM   #6
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Quote:
 Originally Posted by ONEnONLY 3) Simplify (2 - v3)(2+v3)
$\displaystyle We\ have \ a\ mathematical\ relationship: \\\;\\ (a-b)(a+b)=a^2-b^2 \\\;\\ So \\\;\\ (2-\sqrt3)(2+\sqrt3)=2^2-(\sqrt3)^2= ...$

 September 9th, 2014, 09:45 AM #7 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,594 Thanks: 1038 It is almost impossible to "teach" from here... You are almost asking the same as teaching you how to ride a bicycle in one day, when you don't know what handlebars and pedals are... Thanks from Math Message Board tutor
September 9th, 2014, 09:50 AM   #8
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 Originally Posted by Denis It is almost impossible to "teach" from here... You are almost asking the same as teaching you how to ride a bicycle in one day, when you don't know what handlebars and pedals are...
The thing is, teaching what handlebars and pedals are is really easy, and also learning it is really easy too. I really just want the answers, i will learn in lessons. I need this just so i can give it back to the teacher and he can tick the 'done' box...

September 9th, 2014, 10:17 AM   #9
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From: Ottawa Ontario, Canada

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Quote:
 Originally Posted by ONEnONLY I really just want the answers, i will learn in lessons. I need this just so i can give it back to the teacher and he can tick the 'done' box...
I thought everybody from the UK was honest!!

Well, I'm sure not contributing to a "counterfeit pass".
Good luck.

September 9th, 2014, 10:23 AM   #10
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From: UK

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Quote:
 Originally Posted by Denis I thought everybody from the UK was honest!! Well, I'm sure not contributing to a "counterfeit pass". Good luck.
I hate you. I bet you have no life.

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