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Post New Question
All Questions
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230848 Questions
0
536
2
can anyone help
ABCD is a square. Given PA = 1; PB=3 and PD=7, find the area of square ABCD.
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Guest
Jun 23, 2020
0
339
0
probability
A small class of nine boys are to change their seating arrangement by drawing their new seat numbers from a box. After the seat change, what is the probability that there is only one pair of boys who have switched seats with each other and only three boys
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Guest
Jun 23, 2020
0
406
0
probability
A room has nine desks arranged in three rows of three desks. Three students sit in the room. If the students randomly choose a desk, find the probability that two out of the front three desks are chosen.
Guest
Jun 23, 2020
0
480
3
help
One fourth of a number is equal to three times of nineteen. What is one sixth of that number
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Guest
Jun 23, 2020
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463
1
counting
In the opening ceremony of the 2014 FIFA World Cup Brazil, all football teams who participates gathered together. The team captain of each team was handshaking with one another to promote their new act for world peace which was called "A Handshake for Peace!".
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Guest
Jun 23, 2020
+2
717
9
+0
What happened to CPhill?
On the Top Users page, I only see Melody, Alan, heureka, ..., but no CPhill. What happened to him?
off-topic
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GlennJamin5000
Jun 23, 2020
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355
1
help
Compute
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Guest
Jun 23, 2020
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491
1
king arthur problems
(1)10 chairs are arranged evenly around King Arthur's round table. In how many ways can 10 knights be seated in the chairs, if Sir Lancelot and Sir Gawain insist on being seated diametrically opposite each other?
(2)
Now
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Guest
Jun 23, 2020
0
500
1
help
Write the vertex of the function f(x) = -4x^2 - 12x + 9.
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Guest
Jun 23, 2020
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769
1
Need help with a proof.
Let $P(x)$ be a nonconstant polynomial, where all the coefficients are nonnegative integers. Prove that there exist infinitely many positive integers $n$ such that $P(n)$ is composite. I have been able to get three cases. When a0=0, when a0 is greater than
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Guest
Jun 23, 2020
+1
710
1
+781
Repost of: Factoring- I'm kind of stuck and don't know what to do.
(b) Compute the sum .
So I think I will have to apply difference of squares to this. But the many variables are confusing me and making it harder for me. I don't quite get the "2n+1, 2n, 2n-1 etc" part so it's making it difficult
read more ..
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gwenspooner85
Jun 23, 2020
+2
1495
5
+55
Another geo problem
Hi! I have another geometry problem that I'm stuck on, can someone give me a hint or push me in the right direction?
The vertices of triangle ABC lie on the sides of equilateral triangle DEF, as shown. If CD = 3, CE = BD
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ConfuzzledKitten
Jun 23, 2020
0
438
1
help
Solve the equation 2x^2 - 10x + 35 = x^2 + 10.
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Guest
Jun 23, 2020
0
453
1
help
Solve the inequality (x - 3)(x - 5)x < 0.
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Guest
Jun 23, 2020
0
473
1
how can i do this?
If a, b are real number, two sets and What is b - a?
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Guest
Jun 23, 2020
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488
4
math
John is 3/4 the age of James. Three years ago, John was 5/2 the age of James. How old is James?
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Guest
Jun 23, 2020
0
512
1
please help
Find the sum of the first 14 terms of this progression, 2, 5, 8, 11,.....?
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Guest
Jun 23, 2020
+1
519
1
+334
midpoint fun
What is the slope of the line containing the midpoint of the segment with endpoints at $(2, 4)$ and $(0, -2)$ and the midpoint of the segment with endpoints at $(5, 1)$ and $(1, 5)?$ Express your answer in simplest form.
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Rayjplayz
Jun 23, 2020
0
348
1
help
Find primes p and q such that p^2 - 3q = 64.
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Guest
Jun 23, 2020
0
930
2
Some Help
A number is divisible by 9 if the sum of its digits is divisible by 9. For example, the number 19,836 is divisible by 9 but 19,825 is not.
If D767E89 is divisible by 9, where D and E each represent a
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Guest
Jun 23, 2020
0
349
1
help
Person A works twice as fast as person B. Person B can complete a piece of work independently in 12 days. Find the number of days taken by person A and B together to finish the work.
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Guest
Jun 23, 2020
0
663
1
HHEELLPP
Solve for the variable $x$ in terms of $y$ and $z$, assuming $y\neq 3$: \[xy = 3x + 2y + z.\]
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Guest
Jun 23, 2020
+1
534
2
help
The average of 10 numbers is 10. If a number is excluded from this set, then the new average becomes 9.
What is the value of the number that was excluded?
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Guest
Jun 23, 2020
0
423
1
can anyone help?
There are 8 people sitting at a circular table, including Sam, Rebecca, and Diane. Find the number of ways of arranging the 8 people, so that Sam sits directly between Rebecca and Diane.
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Guest
Jun 23, 2020
0
691
2
+781
Factoring- I'm kind of stuck and don't know what to do.
Compute the sum .
So I think I will have to apply difference of squares to this. But the many variables are confusing me and making it harder for me. I don't quite get the "2n+1, 2n, 2n-1 etc" part so it's making it difficult
read more ..
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gwenspooner85
Jun 23, 2020
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