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
230833 Questions
0
716
3
help
Find the smallest positive integer that is exactly half the sum of its proper divisors.
●
●
●
Guest
Nov 17, 2019
-1
1459
3
Help please
Let $ABCD$ be a trapezoid with bases $\overline{AB}$ and $\overline{CD}.$ Let $AD=5$ and $BC=7,$ and let $P$ be a point on side $\overline{CD}$ such that $\frac{CP}{PD}=\frac{7}{5}.$ Let $X,Y$ be the feet of the altitudes from $P$ to $\overline{AD},$ $\overline{BC}$
read more ..
●
●
●
Guest
Nov 17, 2019
0
1209
3
help
How many terms are in the expansion of the expression [(3x + 2y)^2 (3x - 2y)^2]^3 after it is simplified to lowest terms?
●
●
●
Guest
Nov 17, 2019
0
1074
2
+312
NUMBER THEORY
What is the greatest common factor of 20! and 200,000? I got 20,000, but that is incorrect. Explain your method.
CalculatorUser
●
●
mathleteig
Nov 17, 2019
0
583
7
help
One day, Mr Tan tested his five children, "Suppose I count from 1 to 2015 on my left hand's fingers. I begin on my thumb and work my way to my little finger and back to my thumb again (without skipping a finger) and just keep repeating this. On which finger
read more ..
●
●
●
●
●
●
●
Guest
Nov 17, 2019
+2
786
1
+312
QUADRILATERALS
A square with sides 6 inches is shown. If P is a point such that the segment PA, PB, PC are equal in length, and segment PC is perpendicular to segment FD, what is the area, in square inches, of triangle APB?
●
mathleteig
Nov 17, 2019
0
2645
2
angular geomtery
In the diagram, AB is parallel to DC and ACE is a straight line. What is the value of x?
●
●
Guest
Nov 17, 2019
0
646
1
help
Bangladesh & India are playing a five match odi series.If any team wins first 3 matches,then the series is over. The two teams are equally strong.What is the probability that the series will be over in 3 matches?
●
Guest
Nov 17, 2019
0
910
1
help
A triangle with sides of 5, 12, and 13 has both an inscribed and a circumscribed circle. What is the distance between the centers of those circles?
●
Guest
Nov 17, 2019
0
840
1
coordinate plane
The rectangle with vertices (-1,y), (7,y) (7,3) and (-1,3) has an area of 72 square units, and y is positive. What is the value of y?
CalculatorUser
●
Guest
Nov 17, 2019
0
531
1
geometry
In the diagram, G is the centroid of If the area of ABC=72, then what is the area of GME?
●
Guest
Nov 17, 2019
0
365
0
Math
MS. Moua has 20 students in her first-grade class. How many ways can she choose 5 of them to ride in her van for a class field trip? (The rest go with parents from the class).?
Guest
Nov 17, 2019
+1
720
1
help
Rectangle ABCD has all integer side lengths and its interior is divided into seven non-overlapping rectangular regions: two 8 by 10 regions, a 10 by 12 region, a 13 by 5 region, a 13 by 13 region, a 10 by 22 region and a 3 by 16 region. All linear measurements
read more ..
●
Guest
Nov 17, 2019
-1
868
5
+288
Pls Help
Any help on this question will be greatly apprectiated.
Let A and B be two points on the hyperbola xy=1, and let C be the reflection of B through the origin.
(a) Show that C is on the hyperbola.
(b) Let be the
read more ..
●
●
●
●
●
madyl
Nov 17, 2019
0
651
1
help now please
●
Guest
Nov 17, 2019
-1
710
1
+3
algebra help please
Given that -3<=7x+2y<=3 and -4<=y-x<=4 what is the largest possible value of x+y
●
oneoh
Nov 17, 2019
+3
2702
7
+312
GEOMETRY V
An equilateral triangle has sides of length 2 units. A second equilateral triangle is formed having sides that are 150% of the length of the sides of the first triangle. A third equilateral triangle is formed having sides that are 150% of the length of
read more ..
●
●
●
●
●
●
●
mathleteig
Nov 17, 2019
0
1433
1
+312
CLOCK ANGLES
At 2:48, what is the degree measure of the smaller angle formed by the hour and minute hands of a 12-hour clock?
●
mathleteig
Nov 17, 2019
Nov 16, 2019
0
676
2
+4
Pearson
Last weekend, Amy raked leaves in her front yard. She noticed that 11/3 pounds of leaves filled 4/9 of a bag. What is the unit rate for pounds of leaves per bag?
●
●
gracelynn
Nov 16, 2019
0
781
2
help
From a square piece of cardboard measuring 2a on each side a box with no top is to be formed by cutting out from each corner a square with sides b and bending up the flaps, For what value of b (in terms of a) will the box contain the greatest volume?
read more ..
●
●
Guest
Nov 16, 2019
0
651
1
+143
Adv. Inequalities
Let and be nonnegative real numbers such that . Find the maximum value of
●
AoPS.Morrisville
Nov 16, 2019
0
682
1
I don't understand how to do this
An ellipse has its center at the origin, its foci on the y-axis, and its major axis is three times as long as its minor axis. Given that the ellipse passes through the point (-4,0), find its equation.
Express your answer in the form (x-a)^2/r^2
read more ..
●
Guest
Nov 16, 2019
0
1
839
3
help
Find the sum of the orange angles. Give a complete explanation.
Gadfly
●
●
●
Guest
Nov 16, 2019
0
413
0
Help
Ros runs a dance class. She wants to ask her students if they would prefer to start the class at 7 pm or 8 pm. There are 46 students in the class. Should Ros ask all the students in the class or should she ask a sample of the students? Explain your answer.
read more ..
Guest
Nov 16, 2019
«
latest
9232
9231
..
6127
6126
6125
6124
6123
..
2
1
»
Post New Question
2 Online Users
Top Users
+128570
CPhill
moderator
+118608
Melody
moderator
+33616
Alan
moderator
+14923
asinus
moderator
+9575
MaxWong
+3144
admin
administrator
+2440
GingerAle
+1791
tomtom
+1679
wiseowl
+1588
bader
+1133
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.