All Questions ⁺⁰238000 Questions

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217

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Probability

In a series of coin flips, a run is a series of consecutive coin flips that are all the same. For example, in the sequence
the red letters form a run.
If a fair coin is flipped two times, what is the expected length of the longest run? read more ..

Guest Feb 11, 2023

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193

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Probability

In Ms. Q's deck of cards, every card is one of four colors (red, green, blue, and yellow), and is labeled with one of seven numbers (1, 2, 3, 4, 5, 6, and 7). Among all the cards of each color, there is exactly one card labeled with each number. The read more ..

Guest Feb 11, 2023

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181

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counting

Help plz with counting

Find the number of ways of arranging the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 in a row so that the product of any two adjacent numbers is even or a mutliple of 30

Guest Feb 11, 2023

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208

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HELP ASAP

I AM CHEATIN ON AN EXAM! HELP!
find the number of ways to travel from (0,0) to (4,4) moving only up and right

Guest Feb 11, 2023

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172

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+132

Geometry help

In a triangle ABC, the angle BAC is equal to 120 degrees. If AB = c, AC = b, and AD = x, and x is the angle bisector of angle BAC, prove that 1/x=1/b+1/c

Saphia1123 Feb 11, 2023

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204

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what the f*k?

for some reason my previous question was flagged
this website is full of f**s and inc els

Guest Feb 11, 2023

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203

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Algebra

Find all solultions of the equation |x^2 - 30x - 1| + |x^2 - 30x + 1| = 30.

Guest Feb 11, 2023

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186

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Probability

Need help with probability

My sock drawer contains two red socks, two white socks, and two blue socks. For three days in a row, I pull out two socks out of my sock drawer at random. What is the probability that I get matching read more ..

Guest Feb 11, 2023

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219

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Counting

Miyu is giving out 9 identical chocolates to her 7 friends, including Dhruv. All possible distributions are equally likely. What is the probability that Dhruv gets exactly 2 chocolates?

Guest Feb 11, 2023

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211

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HELPPOPP

If I give my brother 5 dollars, then we will have the same amount of money. If instead he gives me 12 dollars, then I'll have twice as much money as he will have. How much money does my brother currently have (in dollars)?

Guest Feb 11, 2023

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238

1

Points $A,$ $B,$ and $C$ are given in the coordinate plane. There exists a point $Q$ and a constant $k$ such that for any point $P$, \[PA^2

vPoints and are given in the coordinate plane. There exists a point and a constant such that for any point ,
If and , then find the constant .

Guest Feb 11, 2023

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205

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counting

Help with grid

Each unit square of the 4 x 4 grid below is to be filled in with the number 1, 2, 3 or 4 so that read more ..

Guest Feb 11, 2023

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182

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Geometry

Help with parallelogram

In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the problem.
<read more ..

Guest Feb 11, 2023

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174

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Counting

In how many ways can 4 balls be placed in boxes if the balls are indistinguishable, and the boxes are distinguishable?

Guest Feb 11, 2023

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170

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Counting

My square patio is tiled with square tiles, all the same size. All the tiles are gray, except the tiles along the two diagonals, which are all yellow. (The corners are yellow, the center is yellow, and all the tiles along the read more ..

Guest Feb 11, 2023

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212

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Counting problem

How many solutions are there to the equation
u + v + w + x + y + z = 18
where u, v, w, x, y, and z are nonnegative integers, and x is at most 10?

Guest Feb 11, 2023

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190

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Sequence

Help how to do this

Cai writes down the list of positive integers, excluding squares and cubes and all perfect powers. His sequence starts
2, 3, 5, 6, 7, 10, 11, ...
What is the 100th term in Cai's list?

Guest Feb 11, 2023

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217

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da li kad oduzimamo razlomke mora da bude isti imenilac?

da li kad oduzimamo razlomke mora da bude isti imenilac?

Guest Feb 11, 2023

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204

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Oops

Guest Feb 11, 2023

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166

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Counting

Need help on this plz

Find the number of ways of choosing three points from the grid below, so that they form an isosceles right triangle.

Guest Feb 11, 2023

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186

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Function

I don't get this

Let F(x) be the real-valued function defined for all real x except for x = 1 and x = 2 and satisfying the functional equation
F(x) + F((2x - 3)/x) = x.
Find the function F(x) satisfying these read more ..

Guest Feb 11, 2023

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219

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Counting

I don't know how

In a row of five squares, each square is to be colored either red, yellow, or blue, so that no two consecutive squares have the same color, and at lest three of the squares are red. How many ways are there to read more ..

Guest Feb 11, 2023

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208

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Counting

This is a counting problem plz help

Syd chooses two different primes, both of which are greater than 10 and multiplies them. The resulting product is less than How many different products could Syd have ended read more ..

Guest Feb 11, 2023

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