All Questions ⁺⁰235714 Questions

0

16

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 ..

sussusus Oct 23, 2023

0

38

0

+817

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

+817

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

27

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.

DSUDLER4251 Oct 22, 2023

0

38

1

+12

help

popppopopppopop22 Oct 22, 2023

0

23

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.

popppopopppopop22 Oct 22, 2023

0

31

1

+12

help

popppopopppopop22 Oct 22, 2023

0

37

0

+817

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 read more ..

maximum Oct 22, 2023

0

70

0

+817

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

33

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 read more ..

turtlenob Oct 21, 2023

0

25

1

+24

need help asap

Fill in the blank to make the equation true.

(8/125)^__ = 5/2.

iuuhfeusedhu Oct 21, 2023

Oct 20, 2023

-1

39

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 read more ..

BobJeffrey Oct 20, 2023

0

46

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 read more ..

dumplings Oct 20, 2023

0

31

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. read more ..

dumplings Oct 20, 2023

0

32

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 read more ..

dumplings Oct 20, 2023

0

25

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 read more ..

Nsikan Oct 20, 2023

+1

33

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 read more ..

tzeperson Oct 20, 2023

Oct 19, 2023

0

46

0

+817

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

20

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?

xxyoohoo Oct 19, 2023

Oct 18, 2023

0

31

1

+1911

equation

Find the distance between the $x$-intercept and the $y$-intercept of the graph of the equation $3x - 6y = 12 + 8x - 3y$.

tomtom Oct 18, 2023

0

54

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

0 Online Users