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
230874 Questions
0
324
0
+80
Help please
Find the centroid of the triangle with vertices (1, 4, -1), (-4, 5, 2), and (6, -1, 7).
jleung
Aug 10, 2021
0
385
2
Probability
Each of the digits 0-9 is written on a slip of paper, and the slips are placed in a hat. If 5 slips of paper are selected at random, determine the probability that the 5 numbers selected are greater than 3.
●
●
Guest
Aug 10, 2021
+1
323
1
Algebra
Let a and b be the roots of 2x^2+7x+11=0. Find a + b.
●
Guest
Aug 10, 2021
0
304
1
Help graphing
The graphs of x^2-2x+y^2+10y=4x-8y+127. Find the radius of this circle.
●
Guest
Aug 10, 2021
0
354
1
help please
find a monic polynomial of lowest possible degree with rational coefficeients and having both 2 and 8-i roots.
●
Guest
Aug 10, 2021
0
420
1
+80
Help please
Question:
●
jleung
Aug 10, 2021
0
338
0
+80
Help please
A median of a quadrilateral connects the midpoint of one side of the quadrilateral to the midpoint of the opposite side of the quadrilateral. Show that the diagonals of a quadrilateral are perpendicular if and only if the medians of the quadrilateral are
read more ..
jleung
Aug 10, 2021
0
212
0
help polynomial
When the polynomial p(x)=Ax^21+Bx^17+Cx^9+8 is divided by x-5 the remainder is 12. find the remainder when P(x) is divided by x+5.
Guest
Aug 10, 2021
0
213
0
Help please
We call quadrilateral ABCD is a kite if AB = BC and CD = DA (or if BC = CD and DA = AB). Use vectors to show that the diagonals of a kite are perpendicular.
Guest
Aug 10, 2021
0
345
0
+80
Help please
(a) Use vectors to prove that if the diagonals of quadrilateral ABCD bisect each other, then ABCD is a parallelogram.
(b) Use vectors to prove that the midpoints of the sides of any quadrilateral are the vertices of a parallelogram.
jleung
Aug 10, 2021
Aug 9, 2021
0
322
1
Algebra
One of the roots of 2x^3-9x^2+18x+k=0 is x=2.Find the other 2 roots. Explain how you got the answer.
●
Guest
Aug 9, 2021
0
430
1
Polynomials
What is the coefficient of x^2 when -5x^3 - 5x^2 - 7x + 1 is multiplied by -x^2 + 6x + 1 and the like terms are combined?
●
Guest
Aug 9, 2021
0
394
1
Answer ASAP tyty
To be able to walk to the center C of a circular fountain, a repair crew places a 16-foot plank from A to B and then a 10-foot plank from D to C, where D is the midpoint of AB. What is the area of the circular base of the fountain? Express your answer
read more ..
●
Guest
Aug 9, 2021
0
342
1
Algebra
Jason has 4 gallons of hand sanitizer that contains 25% alcohol. He wants to make a hand sanitizer that contains 50% alcohol. How many gallons of pure alcohol should he add?
●
Guest
Aug 9, 2021
0
364
3
I'm confused. Please help.
does 2x +7=3x +1?
●
●
●
Guest
Aug 9, 2021
0
415
2
Polynomial
Given that the polynomial x^2-kx+160 has only positive integer roots, find the average of all distinct possibilities for k.
●
●
Guest
Aug 9, 2021
0
369
2
stuck on this question...all help appreciated
Factor x^k - y^k.
●
●
Guest
Aug 9, 2021
0
443
1
Geometric Sequence
Find the 7th term of sqrt(2), sqrt(10), 5*sqrt(2), ...
●
Guest
Aug 9, 2021
0
313
2
Help Please! Thanks!
The sequence is defined by and for Prove that ] for all
My Work: I wrote the relationship as I rearranged this to get
read more ..
●
●
Guest
Aug 9, 2021
0
329
1
+31
Help ASAP
Find all complex numbers z such that z^4=-4
Note: All solutions should be expressed in the form a+bi, where a and b are real numbers.
Thanks,
read more ..
●
soccerfan123
Aug 9, 2021
0
466
2
+47
Need help FAST
In base b, there are exactly one hundred three-digit numbers whose digits are all distinct. (That's "one hundred" in the ordinary sense, 100 base 10.)
What is b?
●
●
SmartCookiezZ
Aug 9, 2021
0
340
1
Function
Let
p(x) = x - 2y
What is p(p(1,-1),p(-5,-2))?
●
Guest
Aug 9, 2021
0
287
1
Math
James had 1/8 as many pencils as Mark. When Mark gave half of her pencils to James, he then had 12 fewer pencils than he had. How many pencils did Mark have at first?
●
Guest
Aug 9, 2021
0
321
1
geometric sequence
The 4th term of a geometric sequence is 18, and the 10th term is 162. What is the 7th term?
●
Guest
Aug 9, 2021
0
341
2
Can i get some help with modulos?
Suppose where
What is the vaule of ?
read more ..
●
●
Guest
Aug 9, 2021
«
latest
9233
9232
..
7912
7911
7910
7909
7908
..
2
1
»
Post New Question
1 Online Users
Top Users
+128577
CPhill
moderator
+118608
Melody
moderator
+33616
Alan
moderator
+14925
asinus
moderator
+9589
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.