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
230922 Questions
+1
422
2
+514
Counting
i got 66, i'm not sure
●
●
mworkhard222
Jun 10, 2021
0
334
1
Domain
Compute the domain of the real-valued function $f(x) = \sqrt{1 + \sqrt{2 - \sqrt{x}}}$.
●
Guest
Jun 10, 2021
0
365
1
Sequences
There is a sequence of numbers such that every entry except for the first entry is the arithmetic mean of its two neighboring entries. The 27th entry is 94 and the 94th entry is 39. What's the first entry?
●
Guest
Jun 10, 2021
+1
444
4
+25
Another problem :>
In physics, Ohm's law says that current through a wire, $I$, is directly proportional to voltage, $V$, and inversely proportional to resistance, $R$:
\[I=\frac{V}{R}.\]
It's also true that resistance is directly proportional to the length
read more ..
●
●
●
●
angelxbobaa
Jun 10, 2021
0
333
1
Coordinates
What is the value of k if point P(k, k sqrt(3)) is 4 units from the line 5x+8y=17?
●
Guest
Jun 10, 2021
0
322
1
+4
Help please! @CPhill
Help please!
@CPhill
●
Lightneedshelp
Jun 10, 2021
0
266
0
1/4x + 8 = 14
Let assume Rohan age is X. If we his age and add 8 then we find this is equal to 14. Write this expression in equation?
Guest
Jun 10, 2021
0
410
3
Math …
John is 10 times the age of his sister. After eight years John will be 18 years old. How old is he right now.
●
●
●
Guest
Jun 10, 2021
0
333
1
help with quadratic
An Ariline currently charges 200 dollars per ticket and sells 40,000 tickets a week. For every 10 dollars they increase the ticket price, they sell 400 fewer tickets a week. How many dollars should they charge to maximize their total
read more ..
●
Guest
Jun 10, 2021
0
373
1
Equation
Farai is two times the age of his sister. After four years he will be fourteen years old. Express this problem in the form of an equation.
●
Guest
Jun 10, 2021
0
353
1
Complex Numbers
Find all complex numbers z such that |z - 3| = |z + i| = |z - 1 - 2i|.
●
Guest
Jun 10, 2021
0
352
2
Need help
For a certain value of $k$, the system \begin{align*} x + y + 3z &= 10, \\ -4x + 3y + 5z &= 7, \\ kx + z &= 3 \end{align*}has no solutions. What is this value of $k$?
●
●
Guest
Jun 10, 2021
0
408
2
fraction
How do you put a fraction like 1/3 on the calculator
●
●
Guest
Jun 10, 2021
0
361
1
Complex Numbers
What is the area of the region of the complex plane defined by |z - 3i| < 8?
●
Guest
Jun 10, 2021
0
338
1
Help with triangles.
In triangle and Points P and Q are on such that P is between A and Q and . Show that .
read more ..
●
Guest
Jun 10, 2021
0
424
1
need help
The second side of a triangular deck is 6 feet longer than the shortest side, and the third side is 6 feet shorter than twice the length of the shortest side. If the perimeter of the deck is 48 feet, what are the lengths of the three sides?
read more ..
●
Guest
Jun 10, 2021
0
436
1
+100
help pls
The equation describes the height (in feet) of a projectile launched from the ground at 60 feet per second upward. In how many seconds will the projectile first reach 56 feet in height? Express your answer as a decimal rounded to the nearest
read more ..
●
Wsai12
Jun 10, 2021
0
546
1
+313
Mathrj
If the neighborhood holds 13 total games and all 50 athletes participate how many six player games and how many two player games are played. write and solve a system of equations
●
apsiganocj
Jun 10, 2021
0
290
2
All the roots of the cubic polynomial are negative real numbers.
All the roots of the cubic polynomial
are negative real numbers. If
find the smallest value of
Prove
read more ..
●
●
Guest
Jun 10, 2021
0
373
2
Percentage
Class X has 50% more students than Class Y. Class X has 40% fewer students than Class Z. Given that there are 80 students in the 3 classes, how many students are there in Class X?
●
●
Guest
Jun 10, 2021
0
378
1
math
A woman labels the squares of a very large chessboard 1 through 64. On each square k, the woman puts 2^k grains of rice. How many more grains of rice are placed on the 10th square than on the first 9 squares combined?
●
Guest
Jun 10, 2021
+1
435
2
+318
mathematics
Jack and his friends are having a party tonight. They decide to order large Pizzas from Dominos for snacks. Assume that Dominos charge 10$ for a large Pizza and a fixed cost of 8$ as dilevery charge. If Jack paid 18$ in total, how many large Pizzas did
read more ..
●
●
Tgfromthe4
Jun 10, 2021
0
338
1
help pls withpolar planes ???
pls help me with this im so confused !!
●
Guest
Jun 10, 2021
0
396
2
Divisibility
Prove that 5^40-5^39 is divisible by 4
●
●
Guest
Jun 10, 2021
0
354
1
sequence
The sum of the first terms n in the infinite geometric sequence {1/4, 1/8, 1/16, ..} is 15/32. Find n.
●
Guest
Jun 10, 2021
«
latest
9235
9234
..
7787
7786
7785
7784
7783
..
2
1
»
Post New Question
1 Online Users
Top Users
+128595
CPhill
moderator
+118608
Melody
moderator
+33616
Alan
moderator
+14929
asinus
moderator
+9589
MaxWong
+3144
admin
administrator
+2440
GingerAle
+1791
tomtom
+1679
wiseowl
+1592
bader
+1145
parmen
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.