All Answers 358087 Answers

9 + 10  =  19.

"the product of four and a numer" means to multiply 4 times a number. Since we don't know what the number is, we'll use a variable, like 'n'. So, we now have:   4·n,  or just  4n.

We now need to subtract  12  from this; so we get:  4n - 12.

When graphing functions, they each need to be solved for y (or for f(x)).

When graphed, the functions are equal when they intersect.

Can you be more specific, including a particular problem?

Can you include the problem?

so here we have to find z , so we shall do it like

-3z - 5 = 10

( Now out here , we will take -5 to the other side , and when we take one variable or digit to other side , we change its sign, so we will also turn -5 to just 5 thats positive)

-3z = 10 + 5 

(and now simply add)

-3z = 15

(now we will take -3 to the other side and divide it by 15)

z = 15/-3 

(now simply divide)

z = -5  ANSWER

I hope you have understood by now but if not then pls be free to ask!

hope this helped!

z= -5

-3z -5 = 10

     +5   +5

-3z = 15

/ -3    /-3

z= -5

No 26 

f(x)=ln(sinx)

sinx must between -1 and 1

okay, ln(whatever)   The 'whatever' must be greater than 0.  You can only find the log of a positive number.

so ln(sinx) must be between 0 and 1       CORRECTION:    So sinx must be between 0 and 1

x must be in the 1st or second quadrant.

How about

$$2n\pi

I invite othe mathematicians to examine what I have said.    

It was a good question.  

It is great when people ask properly thought through questions and stick around long enough to comment on, or further question, the given answers.     

Thanks.

Looks simple the way you have done it, sadly not that simple that it was obvious to me when I tried to do it.

More practice required.

So, how can I write the interval 

It is just a symbol.  A pronumeral like x.

It's value would depend on the problem.

$$\\\left(\frac{1}{16}\right)^{-3/2}\\\\
=\left(\frac{16}{1}\right)^{3/2}\\\\
=16^{3/2}\\\\
=(16^{1/2})^3\\\\
=4^3\\\\
=64$$

If you want to understand more, look here.

Your Welcome Melody!and thank you too!and thank you again , those are really very sweet words!

i want to give u a point again!this one point is of no worth in front of your wonderful words!

Thanks Rosala, it is good to be among friends.  :)

I'll give you some points too because you are not on the forum so much these days and because you are a breathe of fresh air.    

I entered some numbers into my phones little calcuator and the answer came back = 3.2669794e13

What on earth does this mean?

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Anon is just playing games with you - you should not take him seriously.  

The fact that you took such offence would have amused him no end.

It amused me to.  I do not mean any offense by  this  :))

Now I will answer your question.

It means, usually it is a capital E though.

$$3.2669794\times 10^{13}$$            

I am so happy to see you Melody!i observed that u werent present on the forum for past some days!but now im so glad to see your lantern in the sky!your presence just lightens up this place!

better give u a point for it!

Oh, i didnt see so many answers ! this post i dont know how got removed from my watch list so i didnt know any unread answers were too there!

Thank you all of you for liking my post!im really honoured!

yes it is amazing!it will make the hardest Math problem , the easiest one for you!

I'm glad too that you like it!

Yeah, This is why children shouldn't play with the phone.

@@ End of Day Wrap           Sat 11/10/14 Sydney,         Sydney,  Australia Time 10:05pm        ♬

Hi everyone,

I think I have caught up.  I think I have seen every post.  I thought I saw a puddy tat but it was just Pepe Le Pew playing games with me.

It means you dialed the wrong number.

Sun  12/10/14

1) Let's learn a little about Delhi.  Thank you Rosala.   

I think that you may be having a problem with your translator LOL.  

I think that this is what you mean.

In 8 years the value of an investment increased from 1400 euros to 2800 euros.

Find the average annual return.

Ok if I assume this is simple interest the answer is just 100%/8=12.5%

I'll explain this.

2800=2*1400  therefore in 8 years the original amount has increased by 100%

100% divided by 8 years is an average of  12.5%   each year.

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If it is compound interest the answer is more complicated. 

$$\\2800=1400(1+r)^8\\\\
2=(1+r)^8\\\\
2^{0.125}-1=r\\\\
r=0.090507732\\\\
r\approx 9.05\%$$

It should really be compound interest so I would go with  9.05%

$$1000^{2/3}=(1000^{1/3})^2=(\sqrt[3]{1000})^2=10^2=100$$