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What do you call an insect that plays drums?

how do you solve them? Please help. Just solve the first one step by step. Thank you.

 Sep 22, 2014

Best Answer 

 #20
avatar+564 
+8

Okay solved another one just now after class. Some of these are kind of tricky so I'll solve some of them when I'm a little more awake xD

 

$$\frac{a^{3}-49a}{a^{3}+7a^{2}}$$

 

$$=\frac{(a-7)(a^{2}+7a)}{a^{3}+7a^{2}}$$

 

$$=\frac{(a-7)(a^{2}+7a)}{a(a^{2}+7a)}$$ cross out the $$(a^{2}+7a)$$ from the numerator and denominator...

 

$$=\frac{a-7}{a}$$ and here is your final answer!

 

------

 

Now time to do my Political Science homeowork xD

 Sep 22, 2014
 #1
avatar+11912 
+8

i remember this!my drama teacher told me ,................its a  rhythma tick , the answer!

 Sep 22, 2014
 #2
avatar+8261 
0

Ok, but how do you solve the first one? I need to show my work.

 Sep 22, 2014
 #3
avatar+11912 
+8

oh im too tired to show it , sorry !

 Sep 22, 2014
 #4
avatar+8261 
0

Ok.   

 Sep 22, 2014
 #5
avatar+118609 
+5

$$\dfrac{6a^5b^4}{9a^3b^7}\\\\
=\dfrac{2a^5b^4}{3a^3b^7}\qquad $ I have cancelled top and bottom by 3$\\\\
=\dfrac{2aaaaabbbb}{3aaabbbbbbb}\qquad $ I have expanded, there are invisable multiply signs between the letters$\\\\
=\dfrac{2aabbbb}{3bbbbbbb} \qquad $ I have cancelled out aaa top and bottom $\\\\
=\dfrac{2aa}{3bbb} \qquad $ I have cancelled out bbbb top and bottom $\\\\
=\dfrac{2a^2}{3b^3}$$

.
 Sep 22, 2014
 #6
avatar+8261 
0

Ok. Thank you. Now that I have an idea, do I solve the second one step by step?

 Sep 22, 2014
 #7
avatar+118609 
+5

Yes.

You may be able to do more than one cancellation at the same time but it might be better to do it slowly like I have until you get the hang of it.  

 Sep 22, 2014
 #8
avatar+8261 
0

Ok here it goes!

$$\frac{12a^5b^3(3-b)}{4a^4b(b^2+b-12)}\\\\=\frac{3a^5b^3(3-b)}{1a^4b(b^2b-12)}\mbox{I\;have\;canceled\;top\;and\;bottom\;by\;4.}\\\\=\frac{3aaaaabbb(3-b)}{4aaaab(bb+b-12)}\mbox{Now\;that\;I\;have\;expanded,\;there\;are\;no\;invisible\;signs\;between\;the\;letters.}\\\\=\frac{3abbb(3-b)}{4b(bb+b-12)}\mbox{I\;have\;cancelled\;out\;}aaaa\;\mbox{top\;and\;bottom.}\\\\=\frac{3abb(3-b)}{4(bb+b-12)}\mbox{I\;have\;cancelled\;}b\;\mbox{top\;and\;bottom.}\\\\=\frac{3abb(3-b)}{4(bb+b-12)}$$

 Sep 22, 2014
 #9
avatar+8261 
0

Is the answer correct?

 Sep 22, 2014
 #10
avatar+118609 
+5

Is this really your homework Dragon.

Most of what you have dones really good but you made a mistake with the numbers 4divided by 4=1

Sp there is no 4 on the bottom.

After this it gets far to difficult for you!!!

 

$$\\\frac{3abb(3-b)}{1(bb+b-12)}\\\\
=\frac{3ab^2(3-b)}{b^2+b-12}\\\\
$ and that is as far as your teacher could expect you to get - the rest is FAR too difficult. I'll finish if for you just this time$\\\\
=\frac{-3ab^2(b-3)}{b^2+b-12}\\\\
=\frac{-3ab^2(b-3)}{(b+4)(b-3)}\\\\
=\frac{-3ab^2}{b+4}\\\\
=-\frac{3ab^2}{b+4}\\\\$$

 Sep 22, 2014
 #11
avatar+8261 
0

So do I do the top one only? Yes. The teacher have us this as homework to PREPARE US FOR 10TH GRADE.

 Sep 22, 2014
 #12
avatar+8261 
0

And btw, I barely started 6th grade! 

 

  

 Sep 22, 2014
 #13
avatar+8261 
0

Can you help me some more please? I am having difficulties

 Sep 22, 2014
 #14
avatar+564 
+5

I'll try and help you with a few. This thing looks like a lot of work lol .-.

 Sep 22, 2014
 #15
avatar+8261 
0

Oh! Thank god you came! Thank you very much! I just needed someone to help. Thank you!

 Sep 22, 2014
 #16
avatar+8261 
0

I need help with the ones of adding, subtracting, or known as the long ones.

I appreciate your help.

 Sep 22, 2014
 #17
avatar+26367 
+5

Riddle help

 Sep 22, 2014
 #18
avatar+564 
+8

Okay, I solved one this morning before I went to school:

 

$$\frac{(b-5)^{3}}{15+7b-2b^{2}}$$

 

 

$$\frac{(b-5)(b-5)(b-5)}{(-2b-3)(b-5)}$$

Cancel like terms (the (b-5) at the top and bottom)

 

$$-\frac{(b-5)^{2}}{(2b-3)}$$   This is your final answer :D

 Sep 22, 2014
 #19
avatar+8261 
0

Thank you, you two. Thank you.

 Sep 22, 2014
 #20
avatar+564 
+8
Best Answer

Okay solved another one just now after class. Some of these are kind of tricky so I'll solve some of them when I'm a little more awake xD

 

$$\frac{a^{3}-49a}{a^{3}+7a^{2}}$$

 

$$=\frac{(a-7)(a^{2}+7a)}{a^{3}+7a^{2}}$$

 

$$=\frac{(a-7)(a^{2}+7a)}{a(a^{2}+7a)}$$ cross out the $$(a^{2}+7a)$$ from the numerator and denominator...

 

$$=\frac{a-7}{a}$$ and here is your final answer!

 

------

 

Now time to do my Political Science homeowork xD

chilledz3non Sep 22, 2014
 #21
avatar+8261 
0

Thank you. It is very nice of you.

 Sep 22, 2014
 #22
avatar+564 
+5

When is this due?

 Sep 22, 2014
 #23
avatar+8261 
0

Today. I will ask the teacher how to do this, simulating that I don't know.

 Sep 22, 2014
 #24
avatar+564 
+5

Ah okay. This was a nice refresher simplifying polynomials. 

 Sep 22, 2014
 #25
avatar+8261 
0

I got lucky! It is due tomorrow. Not today. Thank god!

 Sep 22, 2014

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