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ADVANCED ALGEBRA

1)    Solving Embedded Root Equations.          by Melody

       http://web2.0calc.com/questions/endless-root#r4

2)    Finding a polynomial equation when given a list of co-ordinates.

          Great expalantion by Geno.    

       http://web2.0calc.com/questions/1-50

LIMITS

1)  Difficult Limit question - Great answer by by Heureka  

     http://web2.0calc.com/questions/lim-sqrt-4x-4-x-2-1-2x-4-3x-2-x-x-2-1-x-gt-infinity#r5

b =-10

So to solve this equation, you will want to isolate the variable, b. In order to do that, b has to be on its own on one side of an equal sign. So you have to get rid of everything else on that side, namely the -9. Since b is multiplied by -9, in order to get rid of it you will have to do the opposite, or divide it. But, whatever you do to one side of the equal sign, you have to do to the other; otherwise it changes the equation. So you have to divide both sides by -9 so that b will be on its own.

So.

-9b=90

-9b/-9 = 90/-9

b= -10

so basically if x is negative, or less than zero, the absolute value of x will be the opposite. So if x= -76 then the absolute value of x will be +76. However if x is positive, or greater than zero, the absolute value of x will be the same as x. So if x=53, then the absolute value of x will still be 53. It works the same for expressions. For example, the expression |3-8|  You solve the expression inside the absolute value signs as you would if they were brackets/parentheses. So, |3-8|= |- 5|, which, since it is negative, is flipped and becomes +5. 

If you mean what I think you mean then.

Find the mean and the standard deviation on your regular calculator.

The score you want will be = mean - 2.2* SD

Hopefully this will be one of the scores in your list of scores.

If this causes dificulties for you, you can tell us why and maybe we can help you more.  :)

You are correct, Guest....I simply forgot that one!!!

An equilateral triangle would have a 60 degree measure for each angle  !!!!!

( 2 + 1/4)  / 5  =

(9/4) / (5/1)      invert the second fraction and multiply

(9/4) * (1/5)   =  

9/20   ......   [Note that this is the same as 0.45]

whats 2 and 1/4 divided by 5

2 1/4 / 5=9/4 X 1/5=9/20

0.45

Let N  be the number of minutes on Monday

2N  be rhe number of minutes on Tuesday

And  [ N + 2N]/ 2  = [3N] / 2  = the number of minutes on Wed.

Note......3 hours = 180 min  .......so we have

N + 2N + [3N] /2 =180        combine like terms on the left

3N + (3/2)N  = 180    →  3N  = (6/2)N

(9/2)N = 180      multiply both sides by 2/9

40 = N   = Monday's minutes

2N  = 80  = Tuesday's minutes

[3 (40) ] / 2   = 60 minutes = Wed.

how do i express 0.010 as a fraction

This is how: .010 X 100/100=1/100. And that is it.

The sum of thirteen and twice a number is seven less than six times a number.  what is the number?

13 + 2N  + 7  = 6N

20 + 2N  = 6N      subtract 2N from both sides

20  = 4N       divide by 4 on both sides

5 = N  = the number

([ 51090] / [ 2.5 * 0.4 * 5.67 * 10^(-8)] )^(1/4)   ≈ 974.289923552229

If the length is L, then,

(2L - 7) the width, but,

L X (2L-7)=43.6

2L^2 - 7L -43.6=0

L=6.736 inches.

W=6.736 X 2 - 7=6.472 inches.

W = 2L  - 7

Perimeter =  2(W + L)    ......so we have

43.6 = 2 ( 2L - 7 + L )

43.6  = 2 (3L - 7)

43.6 = 6L -14     add 14 to both sides

57.6  = 6L    divide both sides by 6

9.6  = L

W = 2(9.6))  - 7   = 12.2

Area = L x W  .....so........   (9.6) (12.2)   = 117.12 square units

Can y'all help with other problems?

5 + 1.25N = 26.25     where N is the number of games Marvin played

Subtract 5 from both sides

1.25N = 21.25       divide both sides by 1.25

N = 17 games

If we set the number of games as N, then:

1.25N + 5=26.25

1.25N=26.25 - 5=21.25

N=21.25/1.25

N=17 No. of games Marvin played.

well its $26.25-$5. then you get $21.25. you then divide that by $1.25 and boom theres your answer

You got it right!!!. Congrats....

11 is the answer

can you put brackets in this equation to make it correct: 24/6-2^2-1^2=9

 It is already pretty clear as it is, but if you wanted to be absolutely certain, then,

 (24/6)-(2^2)-(1^2)=9. There!. Are you happy now?.

11 :D

You made a boo boo cphill. 

Whats 57 x 3? :D There's your answer