All Answers 358087 Answers

1/2 , 2, 5, 11, 23, 47, 95

The next term is found by doubling the previous term and adding 1  =   2(95) + 1   = 191

If A is at 13 and G is at 59......46 equal intervals separate them....and these are broken into 6 equal parts. Thus each of these parts span 46/6 = 23/3 integers.

And the sum of the numbers at B,C, D, E and F is given by

13(5) + (23/3)[(5)(6)/2]=  180

the answer to the square root of 144 over 169 is 12 over 13

Yep, I like your logic Chris :))

Question How do you solve for the intersection between two linear equations? How do you imput that formula in a scientific calculator using variables and constants?

For Example:

Input: solve(2x+3y=5, -4x+y=7)

you get : {x=-((8/7)), y=(17/7)}

On the web2.0calc it is really easy.

Here is an example

Just make sure that the top right corner of the calc is set to equations :))

You just solve the 2 equations simultaneously :)

I have just added this post to the "reference material" sticky topic

I have entered it twice

Once for solving inequalities and once for graphing polynomials :))

That's ok Chris, none of us can answer all the questions in great detail.  We answer what we can with as much time as we can afford to donate at that point in time.

Any correct answer is better than none, I am sure that Sabi appreciated your help :)

I like answering questions like this - it is one of my pet subject areas :))

Oh, thanks Sabi - and you are very welcome :)

thank you:)

Thanks, Melody......time constraints prevent me from explaining this in more detail......

Hi Sabi,

(x-2)(x²-1)>0

(x-2)(x-1)(x+1)>0

consider y=(x-2)(x-1)(x+1)

The roots will be 2,1 and -1.

3 is the highest power of x   (It is degree 3)  

This means that the graph will have 3 (or less, see my notes for the last question) directions.  

(Since there are 3 distinct roots this one has to have 3 directions )

I do not need to do the expansion to see that the coefficient of x³ is +1.

Since it is positive, one of the ends of the graph will be in the TOP RIGHT CORNER

Always start your sketch on the right side.

Above the x axis if it is a positive leading coefficient

and below the x axis if it is a negative leading coefficient.

This is what it must look like

It can be seen from the graph that y is positive  when  -1<x<1  and when x>2

Any more questions the just ask :))

(x-2)(x²-1)>0

Melody, I think they want the sum  of  [5N + 3]  for  N =  1 to 70...so we have.....

5[ (70)(71) / 2] + 70 (3)  = 12635

It is not, it is undefined.

Natalie went to the movies for $16.50 then spent half of her remaining money on jogging shoes. Next she bought lunch for $9.00 then spent half her remaining money on a skirt. After that she still had $21 left. How much money did she start with?

$$\small{\text{$
\dfrac{
\dfrac{x-\$16.50}{2} - \$9.00
}
{2}=\$21
$}} \\\\\\
\small{\text{$
\dfrac{x-\$16.50}{2} - \$9.00 = \$42
$}}\\\\
\small{\text{$
\dfrac{x-\$16.50}{2} = \$51
$}}\\\\
\small{\text{$
x-\$16.50 = \$102
$}}\\\\
\small{\text{$
x = \$118.50
$}}$$

She did start with $118.50

Factor x^2-6x-9

$$\small{\text{$
x^2-6x-9 =
\left[ x-3(1+\sqrt{2}) \right]
\left[ x-3(1-\sqrt{2}) \right]
$}}$$

sin(x) = 0,8 x = ?

x= inverse sin (0.8 )

x= sin^-1(0.8)

x=arc sin(0.8)

x=asin(0.8)

these are different ways of writing the same thing

put 

asin(0.8) into the web2.0calc and you will get your answer :))

tcdf(-50, 1.25, 20)

Wolfram Alpha:

$$\\9e^2 \times (-4ce)=-36ce^3\\\\$$

I do not understand this question.

Maybe someone else will.

Did you leave anythng out?

Now that would depend on what the question is   

Heureka 3/8/15

1 Year = 3.15569e7