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
230566 Questions
+1
476
1
help fast!
I have an unlimited supply of standard 6-sided dice. What's the fewest number of dice that I have to simultaneously roll to be at least 90% likely to roll at least one 6?
You may use a calculator to help you with the computations if you like -- in fact
read more ..
●
Guest
Jul 10, 2019
+3
733
2
+26
insert title here
Pat has two sheets of large, square stamps. One sheet consists of 9 stamps arranged in a 3-by-3 square. (That's 3 stamps by 3 stamps, not 3 inches by 3 inches.) The other sheet consists of 36 stamps arranged in a 6-by-6 square. The stamps on each sheet
read more ..
●
●
musicalnote
Jul 10, 2019
+1
1056
9
+239
Area of Similar Triangles
If E is the middle point of the side CA of the triangle ABC and if R is the area of the triangle, prove that: Cot AEB = (BC2 - BA2) / 4R
●
●
●
●
●
●
●
●
●
OldTimer
Jul 10, 2019
+1
1026
2
+1712
Help me again(HW PROB WARNING)
Ok, here's the drill, please give me a nudge, this is a HOMEWORK PROBLEM! Yayyyy! I need help! Booooo!
What is the value of the sum ? Express your answer as a fraction in simplest form.
read more ..
●
●
tommarvoloriddle
Jul 10, 2019
+1
999
11
+1712
Help!
Help me, please!
●
●
●
●
●
●
●
●
●
●
●
tommarvoloriddle
Jul 10, 2019
0
569
2
Repost...
In the figure,
●
●
Guest
Jul 10, 2019
0
603
1
HALPPP!!!
In the figure,
●
Guest
Jul 10, 2019
0
683
15
Is KhanAcademy website doesn't work currently or is it just me?
On pc.
off-topic
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Guest
Jul 10, 2019
0
463
1
help!!
You are given a fair six-sided dice with the numbers 1 – 6 on the 6 sides. You roll the dice six times. What is the probability of rolling a 5 or 6 at least 5 times? Round your answer to 2 decimal places. I got the answer, but i want a
read more ..
●
Guest
Jul 10, 2019
+1
1
3845
3
+53
The angle of elevation of the top of a tower to a point on the ground is 61. At a point 600 feet farther from the base, in line with the bas
The angle of elevation of the top of a tower to a point on the ground is 61 degrees. At a point 600 feet farther from the base, in line with the base and the first point and in the same plane, the angle of elevation is 32 degrees . Find the height of the
read more ..
●
●
●
cormier123
Jul 10, 2019
Jul 9, 2019
0
1866
1
What is the value of arccos(−12) in radians?
What is the value of arccos(−12) in radians?
* π / 3
* 5π / 6
read more ..
●
Guest
Jul 9, 2019
+1
1352
1
What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?
What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?
* 2√13 / √13
* −2√13 / √13
read more ..
●
Guest
Jul 9, 2019
0
692
1
value of sinθ in simplified form
The terminal side of θ passes through the point (7, −1) . What is the exact value of sinθ in simplified form?
●
Guest
Jul 9, 2019
+2
1386
4
+586
Help
Given that m and n are positive integers such that m is congruent to 6 (mod 9) and n is congruent to 0 (mod 9), what is the largest integer that mn is necessarily divisible by?
●
●
●
●
xXxTenTacion
Jul 9, 2019
0
1561
2
Help Urgent
A line passes through (4,365), and the y-intercept of the line is on or between 1 and 9 . What is the minimum possible slope of the line?
●
●
Guest
Jul 9, 2019
0
1490
1
Help Urgent
Write the equation, in slope-intercept form, of the line passing through the origin and the point (-4,3) .
hectictar
●
Guest
Jul 9, 2019
0
622
1
Help
Express the equation of the line passing through points $(1,7)$ and $(-2,-3)$ in the form $ax+by=c$, where $a$, $b$ and $c$ are integers, the greatest common divisor of $a$ and $b$ is 1, and $c<0$.
THX!!!
read more ..
●
Guest
Jul 9, 2019
0
894
8
+11
help!!
You are given a fair six-sided dice with the numbers 1 – 6 on the 6 sides. You roll the dice six times. What is the probability of rolling a 5 or 6 at least 5 times? Round your answer to 2 decimal places.
●
●
●
●
●
●
●
●
adawertfswert
Jul 9, 2019
0
762
3
Help please
1) Find the sum of the infinite series
2) In a certain sequence the first term is = 2007 and the second term is = 2008. Furthermore, the values of the remaining terms are chosen so that for all . Determine
read more ..
●
●
●
Guest
Jul 9, 2019
0
888
13
Sum of sequence
What is the sum of the following sequence:
1.2.3.4.5....+ 2.3.4.5.6....+ 3.4.5.6.7....4.5.6.7.8....+996.997.998.999.1000.
Any help would be greatly appreciated. I thank you.
heureka
●
●
●
●
●
●
●
●
●
●
●
●
●
Guest
Jul 9, 2019
0
818
11
model selection after fitting probabilty distribution on dataset
how do you compute the model with a minimum residual after fitting probability distributions on a dataset
●
●
●
●
●
●
●
●
●
●
●
Guest
Jul 9, 2019
+8
1587
21
+1712
RIDDLE CHALLENGE # breaking web2.0calcs ice run 2
Right, rules are simple, I post, then somebody posts the solution, and has the honor of posting the next riddle, and the person who solves that can post the next riddle, etc. I have a math riddle:
I am a number
read more ..
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
tommarvoloriddle
Jul 9, 2019
0
1998
3
help
James has a collection of 20 miniature cars and trucks. Cars make up 40% of the collection. If James adds only cars to his collection, how many cars must he add to make the collection 75% cars?
●
●
●
Guest
Jul 9, 2019
0
602
2
Help With Counting & Probability Problem
Mack the bug starts at (0,0) at noon and each minute moves one unit right or one unit up. He is trying to get to the point (5,7). However, at (2,3) there is a spider that will eat him if he goes through that point. In how many ways can Mack reach
read more ..
●
●
Guest
Jul 9, 2019
0
409
1
Help please
Consider the projection matrix P that satisfies Pv = Projection of v onto ]. Find 3 vectors with integer components and magnitude no greater than 8 that satisfy Pv = .
Then, find .
read more ..
●
Guest
Jul 9, 2019
«
latest
9221
9220
..
5992
5991
5990
5989
5988
..
2
1
»
Post New Question
0 Online Users
Top Users
+128460
CPhill
moderator
+118608
Melody
moderator
+33615
Alan
moderator
+14913
asinus
moderator
+9519
MaxWong
+3144
admin
administrator
+2440
GingerAle
+1763
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.