Register
Login
Username
Password
Login
forgot your password?
Home
Forum
+0
Formulary
Maths
Help
Complex Numbers
Integral Calculus
Differential Calculus
Equations
Graphs
Linear Algebra
Number theory
Percent
Standard Functions
Statistics
Trigonometry
Unit Conversion
Units
About
Imprint
Privacy Policy
Terms of Service
Credits
Google+
Facebook
Contact Email
Post New Question
All Questions
+0
230615 Questions
0
901
1
Plane-Wind-Vector problem
If a plane flies from south to north with 324 km/h and the wind blows from northeast to southwest with 28.3 m/s what is the angle between the fly direction and the deviating direction if the pilot ignores the wind? Sorry if my english wasn't able to explain
read more ..
●
Guest
Sep 24, 2017
0
1229
7
powers of 0
0 to the power of 0
hectictar
●
●
●
●
●
●
●
Guest
Sep 24, 2017
0
835
1
How can you factorise a quadratic equation with values larger than squared
(example is 28n^4+16n^3-80n^2)
●
Guest
Sep 24, 2017
0
696
1
Equation
When's doing an equation how can I change the subject of the equation because the final answer on the calculator doesn't get vex me the right subject. The equation was a/(sqrt 1-x^2) = b/c. Make x the subject of this equation
●
Guest
Sep 24, 2017
0
699
1
4^(7)×4^(3)÷4^(6)
4^(7)×4^(3)÷4^(6)
●
Guest
Sep 24, 2017
0
841
1
(1+x^2)i/(1+xi)+(x-6i)
(1+x^2)i/(1+xi)+(x-6i)
●
Guest
Sep 24, 2017
+30
6
13997
9
+118609
PUZZLES
I think it is time for us to have a new puzzle thread
THIS THREAD WILL BE AVAILABLE IN THE STICKY TOPICS
read more ..
●
●
●
●
●
●
●
●
●
Melody
Sep 24, 2017
0
885
2
How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?
How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?
Alan
●
●
Guest
Sep 24, 2017
0
722
1
multiplying this radical expression?
square root of 11(3 - 4 square root of 7)
●
Guest
Sep 24, 2017
0
1127
2
statistics
25,55,40,65,29,45,59,35,25,37,52,30,8,40,55 find the standard deviation and mean
●
●
Guest
Sep 24, 2017
Sep 23, 2017
0
784
1
factoring help please
x^6+2x^3+1 fully factored?
●
Guest
Sep 23, 2017
0
1465
7
Algebra
Compute the sum $$\frac{2}{1 \cdot 2 \cdot 3} + \frac{2}{2 \cdot 3 \cdot 4} + \frac{2}{3 \cdot 4 \cdot 5} + \cdots$$
heureka
●
●
●
●
●
●
●
Guest
Sep 23, 2017
0
2420
1
Algebra
Let $$f(x) = \frac{x^2}{x^2 - 1}.$$Find the largest integer $n$ so that $f(2) \cdot f(3) \cdot f(4) \cdots f(n-1) \cdot f(n) < 1.98.$
read more ..
●
Guest
Sep 23, 2017
+27
2
6906
7
+128475
How Much Do They Weigh ????
This is another problem from American puzzle-maker Sam Lloyd.....
Five little girls taken in couples weigh 129 pounds, 125 pounds, 124 pounds, 123 pounds, 122 pounds, 121 pounds, 120 pound, 118 pounds, 116
read more ..
●
●
●
●
●
●
●
CPhill
Sep 23, 2017
0
663
1
Please help
2 1/4 + 3 1/2 x 1/3
●
Guest
Sep 23, 2017
0
1053
1
Let $f$ be defined by \[f(x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\
Let $f$ be defined by \[f(x) = \left\{ \begin{array}{cl} 3-x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\]Calculate $f^{-1}(0)+f^{-1}(6)$.
●
Guest
Sep 23, 2017
0
716
1
Integers Question
On a number line, let poin P represent the largest integer value that is greater than √201. Let point Q represent the largest integer value that is less than -√20. What is the distance between P and Q?
●
Guest
Sep 23, 2017
0
480
1
Probability
How do you solve probability? I just don't understand it.
●
Guest
Sep 23, 2017
0
772
2
Quick Help on Algebra
Adam and Barb had a book sale over the weekend. Adam sold 4 hardcover books and ten paperbacks. Barb sold 5 hardcover books and 7 paperbacks for the same prices each. Adam sold $62 worth of books while Barb sold $61 worth. How much did they charge for hardcovers
read more ..
●
●
Guest
Sep 23, 2017
0
1
2225
1
Calculating the sum of integers between 2 square roots question
What is the sum of all of the integers between the square root of 25 and the square root of 140 ?
●
Guest
Sep 23, 2017
0
600
1
Plot the inequality on the number line.
Plot the inequality on the number line.
x≤1 or x>8
Choose the correct endpoints.
read more ..
●
Guest
Sep 23, 2017
0
781
2
root
square root 52
TheXSquaredFactor
●
●
Guest
Sep 23, 2017
0
1024
3
How would you solve this?
sqrt(33+sqrt(8))sqrt(6+sqrt(3+sqrt(8)))sqrt(3+sqrt(3+sqrt(3+sqrt(8))))sqrt(3-sqrt(3+sqrt(3+sqrt(8))))
●
●
●
Guest
Sep 23, 2017
0
841
2
what is a irrarational number
what is a irrarational number
●
●
Guest
Sep 23, 2017
«
latest
9223
9222
..
5002
5001
5000
4999
4998
..
2
1
»
Post New Question
4 Online Users
Top Users
+128475
CPhill
moderator
+118609
Melody
moderator
+33616
Alan
moderator
+14915
asinus
moderator
+9519
MaxWong
+3144
admin
administrator
+2440
GingerAle
+1791
tomtom
+1484
bader
+1085
parmen
+1032
kittykat
Sticky Topics
Some guidelines for question askers.
What is Happening 5
Again a number puzzle. Multiply in writing.
Loads of fun printable number and logic puzzles
¤¤¤¤Welcome To Web2.0calc¤¤¤¤
How to display latex properly
Feature Questions 1 - Started 8th May 19
How to upload a picture.
If a question is ticked that does not mean you cannot continue it.
Should you consider anything before you answer a question?
Geometry Thread
PUZZLES
LaTex Coding
/calculator/bsh9ex1zxj
Historical post!
What is happening? Wrap #4
Great Questions to Learn From 2
Great Answers to Learn From
Reference Material
Information for new people.