Help Fast!!!

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March 28th 2006, 01:59 PM
mathelp

Help Fast!!!

I need help with few probs very fast plz help!!

1)
http://i6.photobucket.com/albums/y20...itz/math01.jpg

2)
http://i6.photobucket.com/albums/y20...itz/math02.jpg

3)
http://i6.photobucket.com/albums/y20...itz/math03.jpg

4)
http://i6.photobucket.com/albums/y20...itz/math04.jpg

5)
http://i6.photobucket.com/albums/y20...itz/math05.jpg

6)
http://i6.photobucket.com/albums/y20...itz/math06.jpg
March 29th 2006, 10:27 AM
MathGuru

1 Attachment(s)

heres the first one
March 29th 2006, 10:29 AM
MathGuru

For the second one solve the first part for y to get y = 2x-10 and then sub that into the second equation to get:

x + 3(2x-10) = -9, now solve for x and then sub back in to either of the given equations and solve for y also.
March 29th 2006, 10:32 AM
MathGuru

Q#3

9b^2c + 6c
-----------
......3c

Is the same as:

9b^2c + 6c
------ -----
...3c.......3c

or

3b^2 + 2

does that make sense?
March 29th 2006, 10:41 AM
MathGuru

#5

notice that 27 is 3*(3^2)
notice that 12 is 3*(2^2)

$-4\sqrt27 = -4\sqrt(3*3^2)=3*-4\sqrt3=-12\sqrt3$
March 29th 2006, 11:19 AM
earboth

Quote:

Originally Posted by mathelp

I need help with few probs very fast plz help!!

...
5)
http://i6.photobucket.com/albums/y20...itz/math05.jpg

6)
http://i6.photobucket.com/albums/y20...itz/math06.jpg

Hello,

to Nr. 5:
$-4 \sqrt{27}+2\sqrt{12}=$
$-4 \sqrt{9 \cdot 3}+2\sqrt{4 \cdot 3}=$
$-4 \cdot 3 \sqrt{ 3}+2 \cdot 2 \sqrt{ 3}=$
$-12 \sqrt{3}+4 \sqrt{3}= -8 \cdot \sqrt{3}$

to 6.:
$\left( \frac{5c^{-3} d^4}{p^{-2}} \right)^{-1}\ \cdot \ \left( \frac{p^7 d^{-1}}{c^2} \right)^2 =$
$5^{-1} \cdot c^3 \cdot d^{-4} \cdot p^{-2} \cdot p^{14} \cdot d^{-2} \cdot c^{-2} =$
$\frac{cp^{12}}{5d^6}$

Greetings

EB
March 29th 2006, 11:49 AM
mathelp

Thnaks bro so much
March 29th 2006, 12:16 PM
mathelp

can you show me 2,4 how to do?
March 29th 2006, 12:58 PM
MathGuru

#4

Graph both equations on a graphing calculator and the point where they intersect is your answer of the form (x,y)
March 29th 2006, 01:11 PM
ThePerfectHacker

1 Attachment(s)

Here is the graphs,