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Post New Question
All Questions
+0
236075 Questions
0
21
4
+17
Help
I got this proplem from a friend and can't solve it. Help would be apperciated
We have a sequence where an= 1/n(n+1). (a1=1/2, a2=1/6, ...) What is the sum of the sequence: a1+a2+a3...?
Yes
read more ..
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sussusus
Oct 23, 2023
0
42
0
+816
polynomial problem
A polynomial with integer coefficients is of the form
\[12x^4 + a_3 x^3 + a_2 x^2 + a_1 x + 24 = 0.\]
If $r$ is a rational root of this polynomial, then find the number of different possible values of $r.$
maximum
Oct 23, 2023
0
59
0
+816
help needed
The entries in a certain row of Pascal's triangle are
\[1, n, \dots, n, 1.\]
The average of the entries in this row is 2. Find $n$.
maximum
Oct 23, 2023
Oct 22, 2023
0
30
3
+20
Please help
There were 5/8 as many shells as fish in an aquarium. After 50 shells and 8 fish were removed, the ratio of the number of shells to the number of fish became 1:4. Find the number of shells in the aquarium in the end.
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DSUDLER4251
Oct 22, 2023
0
38
1
+12
help
Let
Evaluate
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popppopopppopop22
Oct 22, 2023
0
25
1
+12
help
Find all values of t such that . If you find more than one value, then list the values you find in increasing order, separated by commas.
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popppopopppopop22
Oct 22, 2023
0
34
1
+12
help
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popppopopppopop22
Oct 22, 2023
0
42
0
+816
help counting
(a) Find the number of ways that Magnus can give out 12 identical stickers to 12 of his friends. (Not everyone has to get a sticker.)
(b) Find the number of ways that Magnus can give out 12 identical stickers to 12 of his friends, if
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maximum
Oct 22, 2023
0
76
0
+816
equation of line
A line passes through the points $P$ and $Q.$ If $P = (-8,2)$ and $Q = (4,-7),$ then write the equation of this line in the form $Ax + By = C,$ where $A$, $B$, and $C$ are integers with greatest common divisor $1,$ and $A$ is positive.
maximum
Oct 22, 2023
Oct 21, 2023
0
36
2
+4
help pls
At a math convention, a poll is taken about cable news. It turns out that $7$ out of every $12$ people are bored by cable news. If there are $280$ people at the convention who are not bored by cable news, then how many people at the convention are bored
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turtlenob
Oct 21, 2023
0
30
1
+24
need help asap
Fill in the blank to make the equation true.
(8/125)^__ = 5/2.
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iuuhfeusedhu
Oct 21, 2023
Oct 20, 2023
-1
42
1
+0
Please help its due today!
1
Triangle ABC is a right triangle with \angle BAC = 90^\circ and \angle B > \angle C. Suppose \overline{AP} is an altitude of the triangle, \overline{AQ} is an angle bisector of the triangle, and \overline{AR} is a median of the triangle, and
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BobJeffrey
Oct 20, 2023
0
49
2
+59
hellp pls - asap
A rectangular room is completely tiled by 1-foot square tiles. All the adjacent to a door or wall are purple, and the rest of the tiles are white. If exactly 2/7 of the tiles are purple, then what is the smallest possible area of the room, in square fe
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dumplings
Oct 20, 2023
0
34
1
+59
system of congruences - help ASAP pls
The solution to the system of congruences
x = 1 (mod 12)
x = 10 (mod 21)
can be written as x = k (mod n), where k is a modulo-n residue.
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dumplings
Oct 20, 2023
0
35
1
+59
number theory help urgent
The solution to the congruence 125x = 20 (mod 405) can be written as x = k (mod n), where k is a modulo-n residue.
a) find the value of k
b) find the value of n
*pretend the equal sign is the congruence
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dumplings
Oct 20, 2023
0
30
0
+4
Neutron interaction
A fluence of thermal neutrons is 6.5 x 1012 n/ cm2 in a layer of muscle-equivalent tissue 0.1 g/cm* thick. What is the absorbed dose at the middle of the layer? Given the equation. D= (σ×N×ϕ×E )/ρ 2.Assume that the above neutron fluence is approximately
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Nsikan
Oct 20, 2023
+1
37
1
+5
Number theory question- please help ASAP!
Let N be a positive integer. prove that can be writen as as the product of at least n prime factors, not necessarily distinct.
I've already figured out that the number of prime factors of will always be equal to n, but how do I prove
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tzeperson
Oct 20, 2023
Oct 19, 2023
0
54
0
+816
domain
In triangle $ABC$, let $I$ be the incenter of triangle $ABC$. The line through $I$ parallel to $BC$ intersects $AB$ and $AC$ at $M$ and $N$, respectively. If $AB = 5$, $AC = 5$, and $BC = 8$, then find the area of triangle $AMN$.
maximum
Oct 19, 2023
+1
25
2
+82
help
In how many ways can three pairs of siblings from different families be seated in two rows of three chairs, if siblings may not sit next to each other in the same row?
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xxyoohoo
Oct 19, 2023
Oct 18, 2023
0
36
1
+1911
equation
Find the distance between the $x$-intercept and the $y$-intercept of the graph of the equation $3x - 6y = 12 + 8x - 3y$.
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tomtom
Oct 18, 2023
0
58
0
+1911
algebra
A line passes through the points $P$ and $Q.$ If $P = (-8,2)$ and $Q = (4,-7),$ then write the equation of this line in the form $Ax + By = C,$ where $A$, $B$, and $C$ are integers with greatest common divisor $1,$ and $A$ is positive.
read more ..
tomtom
Oct 18, 2023
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