All Answers 358516 Answers

(4-5 + 2)

4-5=-1

-1+2=1

Davis,

you have divided by 2pi NOT a half of pi    

You mean on the web 2 calc?

see where it says 'scientific' in the top right corner.

Click on that you you get a drop down menu.

Click equation.

Then you can just enter your simple equation and it will be solved :)

What is the probability of at least 10 consecutive heads in 162 tosses of a fair coin?

The prob that the first 10 are all heads is        1 / (2^10)

There are 152  possible runs of 10   so that is   152 / (2^10)

Probability is around                           152/(2^10) = 0.1484375

The probability is really different than this beacuse I think i have done some multiple counting here.  ://   

202^2/pi*2 = 25976.6331916867891229 cor. to 21 sig. fig.

With the calculator.

what is 8/9 times 7/9 minus 1/9

\(\frac {8}{9} \times \frac {7}{9}- \frac {1}{9}\) = \(\frac {56}{81}- \frac {9}{81} = \frac {47}{81}\) 

magnitude of cU

= c (magnitude of U)

= -3(\(\sqrt{5^2+(-12)^2}\))

= -3(13)

= -39.

Use the format of a/b for \(\dfrac{a}{b}\)

Example: \(\text{Hi}\)

In this example I just typed \(

and then \text{Hi}

then \).

I didn't even click LaTeX button :)

Also I have found a way to use LaTeX without even clicking the LaTeX button.

Type '\(' 

and then type '\)'

and then type your LaTeX commands between the 2 notations.

Thank you :)

That is the Quadratic Equation and we don't need it for finding the value of \(\pi\) . 

\(\pi \approx 3.1415926\)

And that's a quite good approximation already.

Very simple way #1:Use a calculator!! :)

Very simple way #2:

If the number can be simplified to x^2 times y, this will be simple, you get a multiple of the square root of a prime number.

Example: \(\sqrt8 = \sqrt{2^2 \times 2}=2\sqrt{2}\)

\(\sqrt{175}=\sqrt{5^2\times 7}=5\sqrt7\)

The middle step is just for visualization, I can compute these 2 in 1 step in mind because I practise it over and over.

I think this might be better written as:

The coordinates of the endpoints of line segments are given in the options below.

1. A(1, 6), B(4, −3) and C(6, 4), D(9, −1)

2. E(1, −2), F(−4, 3) and G(−2, 3), H(−7, 6)

3. R(−2, −3), S(2, 0) and T(1, 4), U(5, 7)

4. W(−4, 4), X(3, 7) and Y(−3, 1), Z(5, 4)

Which line segments are parallel?

For two line segments to be parallel they must have the same slope.

1.  AB has slope  (-3 - 6)/(4 - 1) = -3

    CD has slope  (-1 - 4)/(9 - 6) = -5/3  

    These are not the same so AB and CD are not parallel.

I'll leave you to use the same method for the other segments.

.

X+y = X+y.

It can't be further simplified, please come back with a sensible question.

2(-6)+4(-5)2: Do you mean 2(-6)+4(-5)²?

\(\begin{array}{rl}&2(-6)+4(-5)^2\\=&-12+4(25)\\=&100-12\\=&88\end{array}\)

Volume of water: \(\dfrac{1}{2}\left(\dfrac{4\pi(6)^3}{3}\right)\times\dfrac{2}{5}=144\pi \times\dfrac{2}{5}=\dfrac{288\pi}{5}\)cm³

If the cone is inverted, the shape that the water formed in the cone is still a cone:

\(\dfrac{1}{3}\pi r^2(12)=\dfrac{288\pi}{5}\\ 60\pi r^2=864\pi\\ r^2=\dfrac{864}{60}=\dfrac{72}{5}\\ r=\dfrac{6\sqrt{10}}{5}\)

ANS: r = 6/5 x sqrt(10)

If the cone is not inverted, the shape that the water formed in the cone is a fructum(or something like that?) and the surface area can't be worked out without the exact height of the hollow cone.

Therefore ANS = 6sqrt(10)/5

2/3 + 1/7

= 14/21 + 3/21

= 17/21

Do you mean 3.(285714)repeated?

\(3.\bar{2}8571\bar{4}\\ = 3 + \dfrac{2}{7}\\ =3\dfrac{2}{7}\\ =\dfrac{23}{7}\)

Ummmmm

I think it might be   -8.2364pi  imperial bitter minims  ....://///

Can I have my banana daqueri now please ?   I brought my own banana and I don't mind about a little bit of spit. :/  

"I would show you in LaTex, but for some blŏŏdy reason it will not render on my computer."

I have this problem when I use my tablet computer.  However, I've found that, although it doesn't render while I'm entering the LaTeX, it does seem to render ok if I then press Show Preview.  If you make a mistake in the LaTeX you can then press Edit and correct it (this is more of a pain than having it render immediately of course!).  This might (or might not!) work for you.

Well Ginger it seems that you can edit your answer which is much more than most of us can do.  

It is good to see you posting an answer:)

You can also use the function abs(x) on the calculator.  e.g.  abs(-6) will result in 6

.

 (1/2)-98=

\(\frac {1}{2}-98= -97 \frac {1}{2}\)

It means the exponent value is in the positive range. 

Examples:

3.0 * 10³   = 3000  This is a positive index (exponent).

3.0 * 10^-3  =1/3000 This is a negative index (exponent).

I would show you in LaTex, but for some blŏŏdy reason it will not render on my computer.

EDIT . . . . Append . . . .

\(3.0 \times 10^3 = 3000 \leftarrow \text { This is a positive index (exponent).}\\ 3.0 \times 10^{-3} = \dfrac{1}{3000} \leftarrow \text { This is a negative index (exponent).}\\\)