All Questions ⁺⁰237119 Questions

0

33

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paths

Find the number of paths from $A$ to $I,$ if each step must be in a right-ward direction. (For example, one possible path is $A \to B \to C \to E \to F \to H \to I.$) read more ..

BuilderBoi ●●

tomtom Oct 12, 2023

0

63

2

+1926

pascal's triangle

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 $n$.

tomtom Oct 12, 2023

0

15

3

+1926

binomials

Write the following expression as a single combination $\binom{n}{k}$ so that $k \neq 1$ and $n-k \neq 1.$
\binom{3}{1} + \binom{3}{2} = ?

tomtom Oct 12, 2023

0

70

1

+1926

simplify

For non-negative integers $a$ and $b,$ where $a \ge 2$ and $b \ge 2,$ simplify
(a + b)/2 - a/2 - b/2

tomtom Oct 12, 2023

+2

33

4

+4

Algebra Help

Find all real numbers x such that (3x - 27)^3 + (27x - 3)^3 = (3x + 27x - 30)^3.

BuilderBoi ●●●●

CoolMathUser123 Oct 12, 2023

0

43

2

+4

Algebra Help

Let be a real number such that Then
125x=a√b. What are a and b?

CoolMathUser123 Oct 12, 2023

Oct 11, 2023

0

74

0

+1926

help plz

Line $\ell_1$ is horizontal and passes through $(2,-8)$. Line $\ell_2$ is vertical and passes through $(-7,5)$. Line $\ell_3$ passes through $(-1,7)$ and $(8,-5)$. Line $\ell_4$ passes through $(3,-1)$ and $(2,-4)$. Find the point read more ..

tomtom Oct 11, 2023

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85

0

+1926

need help with lines

Find the equation whose graph is shown below. Write your answer in standard form.
(Standard form is $Ax+By = C$, where $A$ is positive, and $A$, $B$, and $C$ are integers with greatest common divisor $1$.) read more ..

tomtom Oct 11, 2023

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66

0

+1926

lines

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.

tomtom Oct 11, 2023

0

81

0

+1926

equations of lines

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

tomtom Oct 11, 2023

0

81

0

+157

Please help

Ravi had a total of 80 pieces of $10 notes and $50 notes. He used 1/2 of his $10 notes and deposit 8 pieces of $50 into the bank. After which, the number of $50 notes he had became 2/5 of the number of $10 notes. Find read more ..

sugabreaddoughman Oct 11, 2023

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61

1

+157

Please help. Thanks

Ali made some bookmarks to sell at a funfair. He sold 50 bookmarks on Saturday and 1/3 of the remaining bookmarks on Sunday. He still had 3/7 of the bookmarks left. How many bookmarks did Ali make?

sugabreaddoughman Oct 11, 2023

0

41

1

+157

Confuse please help

Derrick, John and Kenneth had a total of 720 stickers. Derrick used 20% of his stickers, John used 80 stickers and Kenneth used twice as many stickers as Derrick. They had 448 stickers left. How many stickers did Derrick have at first?

sugabreaddoughman Oct 11, 2023

0

54

1

+157

help

Peter painted a total of 3 rooms. He spent 1/5 of his time on the first room and 1/3 of the remaining time on the second room. He spent 8 hours painting the last room. How much time did he take to complete painting all 3 rooms?

sugabreaddoughman Oct 11, 2023

0

61

1

+12

Help on this

Edi bought some sweets. On Thursday, he gave some sweets to his friends. The number of sweets given on Thursday was 3/5 the number of sweets left. On Friday, he gave 130 sweets from the sweets left on Thursday to his neighbours. The total number read more ..

johnnyyp1dee Oct 11, 2023

0

49

1

+12

Help!Thxx

On his outward journey, Ali travelled at a speed of skm/h for 2 1/2 hours. On his return journey he increased his speed by 4 km/h and saved 15 minutes. Find Ali's average speed for the whole journey.

johnnyyp1dee Oct 11, 2023

0

66

1

+1926

polynomial roots

A polynomial with integer coefficients is of the form
\[21x^4 + a_3 x^3 + a_2 x^2 + a_1 x - 28 = 0.\]
If $r$ is a rational root of this polynomial, then find the number of different possible values of $r.$

tomtom Oct 11, 2023

0

94

0

+1926

polynomial roots

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 $r.$

tomtom Oct 11, 2023

0

68

1

+1926

help plz

A line passes through the points $A,$ $B,$ and $C.$ If $A = (-2,-4),$ $B = (-3,12),$ and $C = (4,y),$ then find $y.$

tomtom Oct 11, 2023

0

50

2

+1926

lines

A line has a slope of $m,$ and its $y$-intercept is $(0,b)$. If $m = 8$ and $b = 14,$ then what is the $x$-intercept of the line?

tomtom Oct 11, 2023

0

77

0

+1926

distance

The distance between the points $A$ and $B$ is $\sqrt{5}.$ If $A = (a,-1)$ and $B = (2,2a-7),$ then find the sum of all possible values of $a.$

tomtom Oct 11, 2023

+2

53

2

+28

I don’t know how to start

Let be a polynomial with integer coefficients. There exist distinct integers such that
and What is the smallest possible value of

WaterPheonix Oct 11, 2023

Oct 9, 2023

0

54

2

+4

Determine the complex number $z$ satisfying the equation $3z+4i\bar{z}=1-8i$. Note that $\bar{z}$ denotes the conjugate of $z$.

Determine the complex number $z$ satisfying the equation $3z+4i\bar{z}=1-8i$. Note that $\bar{z}$ denotes the conjugate of $z$.

babyg Oct 9, 2023

0

63

1

+1348

help I have counting issues

(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 ..

sandwich Oct 9, 2023

3 Online Users