All Answers 358178 Answers

0

since you're flipping a coin, the probability of getting heads is 1/2 and the probability of tails, obviously, is 1/2.
if you're going to find the probability of flipping the coin three times and getting heads three times, you multiply .5 x .5 x .5 (since you are trying to find the decimal ["ROUND TO THE NEAREST THOUSANDTHS], convert the fractions to decimals), giving you .125.
you don't even need to round in this case.
-brosshades

GuestJun 12, 2012

+8

0

Ah thank you!
I keep forgetting when something in brackets is squared it's essentially two of the same brackets multiplied by each other.

DenizYildirimJun 12, 2012

+8

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11x+8=8x+17

Take away 8x from both sides

11x+8-8x=8x+17-8x

3x+8=17

Shift 8 to the other side of the equation thus making it negative

3x=17-8
17-8 =9 so:

3x=9

Divide by 3 on both sides of the equation

3x/3=9/3

Which means:
x=3

DenizYildirimJun 12, 2012

+3146

0

(2y+1)^2
(2y+1)*(2y+1)
2y*2y+1*2y+1*2y+1*1
4y^2+2y+2y+1
4y^2+4y+1

adminJun 12, 2012

+3146

0

[input]x^2+6x-16=0[/input]

adminJun 12, 2012

+3146

0

sqrt(x + 3) = -6

no solution.

[input]plot( sqrt(x + 3), -6, x=-10..10 )[/input]

adminJun 12, 2012

+3146

0

[input]asin( 300*sin(84) / 100 )[/input]
this is a complex solution.

[input]300*sin(84) / 100[/input]
the argument of asin(..) is 2.98356568610481.

[input]plot( sin(x), x=-360..360 )[/input]
sin(..) has a result between -1 and 1.

asin is the inverse of sin, so an argument outside of -1..1 (here 2.98356568610481) has to result in some "complex" result. (which is in this case really a complex number)

adminJun 12, 2012

+3146

0

(x − 4) = 2x
(x − 4) -2x=0
x − 4 -2x=0
-x-4=
x=-4

[input]x-4=2x[/input]

adminJun 12, 2012

+3146

0

[input]solve( b*n= n + a, n)[/input]

b*n= n + a
b*n-n= a
n*(b-1)= a
n=a/(b-1)

adminJun 12, 2012

0

x^2+6x+9=0
X^2+6x=-9
x^2+6x/2=-9
x^2+3x +(3)^2=9-9
(x+3)^2= + or - sqr(0)
x=-3 + or - Sqr(0)
X= -3

(-3)^2+6(-3)+9=0
9-18+9=0
0=0

GuestJun 12, 2012

+42

0

no calculator needed:
divide both sides through 4
you get x+1 > 4
x>3
simpel?

ricom39Jun 12, 2012

+42

0

(a+b)(x+y) should be right

ricom39Jun 12, 2012

0

GuestJun 12, 2012

Jun 11, 2012

+3146

0

[input]solve( A=(a+b+c)/3, b)[/input]

adminJun 11, 2012

+3146

0

[input]4/ ( 4/9 )[/input]

adminJun 11, 2012

+3146

0

[input]round(21.277, 2)[/input]

adminJun 11, 2012

+3146

0

[input]3/7x+6=3x[/input]

adminJun 11, 2012

0

The answer y(a+b) + x(a+b) is right, because if you solve xy(a+b), you'll get the solution ayx + byx and that's false

GuestJun 11, 2012

Jun 10, 2012

0

For the kind person who put it into numbers, many thanks indeed.

GuestJun 10, 2012

+3146

0

[input]7.14/(1.67x10^-27)[/input]

adminJun 10, 2012

+3146

0

[input]100! in hex[/input]

adminJun 10, 2012

+3146

0

r: radius
h: height

Area=2*pi*r*(r+h)

339=2*pi*r*(r+h)
r=2*h
[input]solve( 339=2*pi*r*(r+h), r=2*h )[/input]

{r=5.997417539138687, h=2.998708769569344}

adminJun 10, 2012

+3146

0

[input]3.27*10^14[/input]

3.27*10^14
3.27*100000000000000
327000000000000

adminJun 10, 2012

Jun 8, 2012

0

or better yet... is there a way to have the web2.0Calc display the steps IT took to reach it's answer so i can see where exactly i went wrong on a problem?

GuestJun 8, 2012

+42

0

with fingers and without fear...)))

kumoldJun 8, 2012

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