All Answers 358087 Answers

The slope at any point x is given by s(x) = 4x - 2.  The average of this depends on the interval over which you want to calculate it.  If you want it from x = lo to x = hi, say then the average is given by $$\frac{\int_{lo}^{hi}{s(x)dx}}{hi-lo} = 2(hi+lo-1)$$

If lo = -hi then the average is just -2.

As written it doesn't make much sense!

If the decimal point were one place too far to the left it would have been £13,231.72 which would make more sense as money because you would expect only two decimal places for the pennies.

5% can be written as a decimal by moving the decimal place over two to the left and removing the percent sign.

So, 5% can be written as 0.05.

Also, "of" can be interpreted as "multiply."

So now we have

$$\begin{array}{l}
0.05 \times 4445\\
222.25
\end{array}$$

thanks so much again!

To find the percent that 15 is of 200.....just use the calculator...hit the "2nd" button and then key in 15/200. Then hit the "%" key.....it will give you answer in terms of a percent.....

59/7 = 8+(3/7)  cents.....= 8 cents (rounded).......and we'd only want to play with a "rounded" marble....!!!

Happens too often.

I'll do 12, Nataszaa...the rest use exactly the same process......

12) y=3x+1

First ....get x by itself  by subtracting 1 from both sides

y - 1  = 3x      divide both sides by 3

(y - 1) / 3   = x

Now...."switch" x and y

(x - 1) / 3  = y     now, for "y"...write f^-1(x).....so we have...

f^-1(x) = (x - 1) / 3      ....and that's the inverse function.....

Round the number  to nearest multiple of 10. 72 becomes 70. 58 becomes 60. Then add it. HEre is a link. http://www.ixl.com/math/grade-3/estimate-sums

thanks Alan!

Hello CPhil!

I still think you should get paid to do this stuff! And i am also deeply sorry if any of these are "vague"? I am strictly going by what is in the book. I do not make them up.

 #27 specifies: g(x)=2x h(x)=x^2+4

(h°g)(1)  means do y = g(1) first then find h(y).  So:  y = g(1) = 2*1 = 2;  h(y) = 2² + 4 = 8 i.e. (h°g)(1) = 8

Try the same method with the others.  Note that for #30 you need to set y = h(-2), then find g(y).

#58 5(x2/3)^7-6

I'm assuming that we have this???......... 5[x^(2/3)]^(7-6)   = 5[x^(2/3)]^(1) = 5[x^(2/3)] = 5x^(2/3).......I'm not too sure that I've answered what was actually asked on this one, Nataszaa !!!! If it's not....maybe you could provide more info to us ????

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#59 (-27x^-9)1/3

So we have....

-3x^(-3)

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#60 (-32y^15)1/5

So we have....

-2y^3

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And that's it!!!

yea i am not too sure on these...thank you for trying!

THANK YOU FOR ANSWERING THESE 2

can someone do the other 3?

The orange circle is those who like cricket

The blue is those who like baseball

The "9" outside represents the number of those who like neither sport.....

@Melody

These questions are from a book...i did not make them up so...i cannot read the books mind either. 

You know Melody , thats what i was saying "dont answet it at all" (only if u dont know or anything else)!

Zegroes , think this has been a good lesson to learn for you.......

Thank you Melody for the thumbs up!

btw Tresure Hunt is really fun!

I think we all are correct on our places, all of us told the same answer but just in different ways like some used the shortcut whereas others told "if the shortcut doesnt work , heres the long cut" and nothing else!

Melody not only his , its Kishore Kumar's 85th birthday too! He was a popular Indian playback singer!

interested , check out!

(5/8) x 300 =

1500/8  = 750/4 = 375/2 = 187.5

Tuesday 5/8/14

What is a Venn diagram