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
234943 Questions
0
421
2
probability
Two different numbers are chosen from the set {1, 2, 3, ..., 10}. What is the probability that their sum is 8 or greater?
●
●
Guest
Jul 20, 2020
0
442
1
please help
Two candles of the same height are lit at the same time. The first is consumed in 4 hours and the second in 3 hours. Assuming that each candle burns at a constant rate, in how many hours after being lit is the first candle twice the height of the second?
read more ..
●
Guest
Jul 20, 2020
0
518
1
algebraic system
Solve
How can I start?
●
Guest
Jul 20, 2020
0
15
1460
1
geometry question
The composite figure shown above is composed of a semi-circle (colored red), a rectangle (colored blue), and an isosceles triangle (colored green). The longer side of the rectangle is three times the radius of the semi-circle. The altitude of the triangle
read more ..
●
Guest
Jul 20, 2020
0
466
1
quick question
the sum of two numbers is 63. the smaller number is 21 less than the larger number. what are the numbers
●
Guest
Jul 20, 2020
0
465
1
help on geometry please help me
In triangle ABC, angle B = 90 degrees. Semicircles are constructed on sides AB, AC, and BC as shown below. Show that the total area of the shaded region is equal to the area of triangle ABC.
read more ..
●
Guest
Jul 20, 2020
+8
556
6
+568
Plz help probability
You take the four Aces, four 2's, and four 3's from a standard deck of 52 cards, forming a set of 12 cards. You then deal all 12 cards at random to four players, so that each player gets three cards. What is the probability that each player gets an Ace,
read more ..
●
●
●
●
●
●
iamhappy
Jul 20, 2020
+11
1889
7
+568
Melody or CPhill help please quick
A bag contains five white balls and four black balls. Your goal is to draw two black balls.
You draw two balls at random. Once you have drawn two balls, you put back any white balls, and redraw so that you again have two drawn balls. What is the probability
read more ..
●
●
●
●
●
●
●
iamhappy
Jul 20, 2020
0
563
6
+171
heeeeelp (repost cuz typo)
An expression is formed using the numbers 7, 16, 25, and 27 according to the following rules.
Each of the four numbers is used exactly once.
The four numbers may be used in any order.
Exactly three operations are used; each one
read more ..
●
●
●
●
●
●
BillyBobJoeJr
Jul 20, 2020
0
923
2
+13
Here is the answer and the question so no one has trouble
If $a$ is a constant such that $9x^2 + 24x + a$ is the square of a binomial, then what is $a$?
●
●
Stacey1
Jul 20, 2020
-1
560
2
geometry
A circle is inscribed in a quarter-circle sector. It is tangent to the arc of the sector and the two perpendicular radii of the sector. What is the ratio of the area of the inscribed circle to the area of the sector?
read more ..
●
●
Guest
Jul 20, 2020
-1
444
1
help on inequality
Pls help me help me pls guys
●
Guest
Jul 20, 2020
-1
441
1
help on system
Help on system of equations using substitution
●
Guest
Jul 20, 2020
+6
576
1
+136
Please help ASAP!
The sequence is defined by and for
Prove that for all
●
EinsteinBrain29
Jul 20, 2020
0
533
1
help
Find the value of $\sqrt{a}\cdot\sqrt{a+6}\cdot\sqrt{b}\cdot\sqrt{b+6}$ for $(a,b)=(7,91)$
●
Guest
Jul 20, 2020
0
413
1
please help with geometry!
What is the value of x in the figure below?
●
Guest
Jul 20, 2020
0
535
1
help
https://web2.0calc.com/questions/help_35095
●
Guest
Jul 20, 2020
+1
916
1
+256
PLEASE HELP!!!
The odds of losing a certain card game is 7 to 13, which means that on average there are 7 losses for every 13 wins. What is the probability of losing the game? Express your answer as a percent.
●
MathWizPro
Jul 20, 2020
0
398
1
please help
Ron lives in San Francisco and wonders if it would be faster to take the train or his car to work. The distance from his house to his office is 3 miles, and the train station is right next to his house. The car goes across town at an average speed of 10
read more ..
●
Guest
Jul 20, 2020
0
424
1
can anyone solve this
You have the choice between two race cars for a 100 mile race. Both of the cars have a gas tank that can go 21 miles. The first car takes 30 seconds to refuel and goes 185 miles per hour. The second car takes 90 seconds to refuel but goes 200 miles per
read more ..
●
Guest
Jul 20, 2020
+1
561
2
+256
PLEASE HELP ASAP!
When 0.363636... is expressed as a common fraction in lowest terms, what is the sum of the numerator and denominator?
●
●
MathWizPro
Jul 20, 2020
+1
1020
2
+256
A Bit Of Time Problem...
From 8:48 a.m. to 11:18 a.m. on a Thursday morning, how many seconds elapse?
●
●
MathWizPro
Jul 20, 2020
0
395
1
Please Help!
The circle 2x^2 = -2y^2 + 12x - 4y + 20 is inscribed inside a square which has a pair of sides parallel to the x-axis. What is the area of the square?
●
Guest
Jul 20, 2020
«
latest
9396
9395
..
6869
6868
6867
6866
6865
..
2
1
»
Post New Question
3 Online Users
Top Users
+118658
Melody
moderator
+37093
ElectricPavlov
+33653
Alan
moderator
+14986
asinus
moderator
+5265
rarinstraw1195
+3146
admin
administrator
+2653
LiIIiam0216
+2489
GingerAle
+1911
tomtom
+1837
NotThatSmart
+1758
bader
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.