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
237754 Questions
0
26
1
+977
Geometry
In triangle $ABC,$ $AB = 3,$ $AC = 5,$ $BC = 7,$ and $D$ lies on $\overline{BC}$ such that $\overline{AD}$ bisects $\angle BAC.$ Find $\cos \angle BAD.$
●
magenta
Jan 30, 2025
0
23
1
+977
Geometry
In triangle $ABC,$ $BC = 32,$ $\tan B = \frac{3}{5},$ and $\tan C = \frac{1}{4}.$ Find the area of the triangle.
●
magenta
Jan 30, 2025
0
15
1
+977
Geometry
For what value of $c$ will the circle with equation $x^2 - 10x + y^2 + 10y + c = 0$ have a radius of length 1?
●
magenta
Jan 30, 2025
0
45
0
+977
Geometry
What is the area of the region defined by the equation $x^2+y^2 - 7 = 4y-14x+2x-6y+3$?
magenta
Jan 30, 2025
0
44
0
+970
Geometry
The tangent to the circumcircle of triangle $WXY$ at $X$ is drawn, and the line through $W$ that is parallel to this tangent intersects $\overline{XY}$ at $Z.$ If $XY = 15$ and $WY = 10,$ find $WX.$
gnistory
Jan 30, 2025
0
26
1
+970
Geometry
Let $IJKLMN$ be a hexagon with side lengths $IJ = LM = 3,$ $JK = MN = 3,$ and $KL = NI = 3$. Also, all the interior angles of the hexagon are equal. Find the area of hexagon $IJKLMN$.
●
gnistory
Jan 30, 2025
0
36
1
+970
Geometry
The interior angles of a polygon form an arithmetic sequence. The difference between the largest angle and smallest angle is $56^\circ$. If the polygon has $3$ sides, then find the smallest angle, in degrees.
●
gnistory
Jan 30, 2025
Jan 29, 2025
0
23
1
+970
Geometry
In square ABCD, P is on BC such that BP = 4 and PC = 1, and Q is on line CD such that DQ = 2 and QC = 3. Find sin angle PAQ.
●
gnistory
Jan 29, 2025
0
40
1
+970
Geometry
In quadrilateral $BCED$, sides $\overline{BD}$ and $\overline{CE}$ are extended past $B$ and $C$, respectively, to meet at point $A$. If $BD = 8$, $BC = 3$, $CE = 1$, $AC = 19$ and $AB = 13$, then what is $DE$?
●
gnistory
Jan 29, 2025
0
35
1
+857
Algebra
Five workers have been hired to complete a job. If one additional worker is hired, they could complete the job $4$ days earlier. If the job needs to be completed $20$ days earlier, how many additional workers should be hired?
●
cooIcooIcooI17
Jan 29, 2025
0
33
1
+857
Algebra
Three runners, Dirk, Edith, and Foley all start at the same time for a $24$ km race, and each of them runs at a constant speed. When Dirk finishes the race, Edith is $10$ km behind, and Foley is $15$ km behind. When Edith finishes the race, how far
read more ..
●
cooIcooIcooI17
Jan 29, 2025
0
52
0
+857
Algebra
For a certain value of $k$, the system
x + y + 3z &= 10, \\
6x + 4y + z &= 18 - 5y - x, \\
kx + 7z &= 8 - 14y
has no solutions. What is this value of $k$?
cooIcooIcooI17
Jan 29, 2025
0
49
0
+857
Algebra
Find the ordered quintuplet (a,b,c,d,e) that satisfies the system of equations
a+2b+3c+4d+5e=47
2a+3b+4c+5d=15
3a+4b+5c=34
read more ..
cooIcooIcooI17
Jan 29, 2025
0
36
1
+810
Algebra
Assume that f(3) = 4. Name a point that must be on the graph of y= (5 + f(2x/3))/11$.
●
crimefightingvigiI
Jan 29, 2025
0
34
1
+810
Algebra
Find all points (x,y) that are 5 units away from the point (2,7) and that lie on the line x + y = 13.
●
crimefightingvigiI
Jan 29, 2025
0
35
1
+810
Algebra
Let x \mathbin{\spadesuit} y = \frac{x^2}{y} for all x and y such that y\neq 0. Find all values of $a$ such that $a \mathbin{\spadesuit} (a + 1) = 9$. Write your answer as a list separated by commas.
●
crimefightingvigiI
Jan 29, 2025
0
49
0
+810
Algebra
Suppose $a(x) = 2x + 5 - 3x^2 + x^3$ and $b(x) = 4 - x^2 + 4x^4$. Find $(a\circ b)(3) - (b\circ a)(3).$
crimefightingvigiI
Jan 29, 2025
+1
31
1
+987
Algebra
Find the largest integer k such that the equation
5x^2 - kx + 8 - 20x^2 + 45 = 0
has no real solutions.
●
booboo44
Jan 29, 2025
+1
45
0
+987
Algebra
Let b be a constant. What is the smallest possible degree of the polynomial f(x) + b \cdot g(x), where f(x) = 2x^5 - 6x^4 - 4x^3 + 12x^2 + 7x - 5 and g(x) = x^6 - 17x^5 + 2x^4 + 6x^3 + 11x^2 - 8x + 1.
booboo44
Jan 29, 2025
+1
42
0
+987
Algebra
Let f be a cubic polynomial such that f(0) = 5, f(2) = 8, f(3)=13, and f(7) = -5. What is the sum of the coefficients of f?
booboo44
Jan 29, 2025
«
latest
9509
9508
..
9467
9466
9465
9464
9463
..
2
1
»
Post New Question
2 Online Users
Top Users
+130556
CPhill
moderator
+37191
ElectricPavlov
+15143
asinus
moderator
+2387
Bosco
+1761
parmen
+1301
AnswerscorrectIy
+987
booboo44
+857
cooIcooIcooI17
+818
maximum
+678
Straight
+307
Imcool
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.