All Questions ⁺⁰238453 Questions

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227

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Counting

Help I need help with this

I run a book club with n people, not including myself. Every day, for 100 days, I invite members in the club to review a book. What is the smallest positive integer n so that I can avoid ever having the read more ..

Guest Jan 24, 2023

0

224

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Expected value

What do I do here help me

Suppose we have a bag with 10 slips of paper in it. Eight slips have a 3 on them and the other two have a 5 on them.
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Guest Jan 24, 2023

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231

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Probability

Probability is hard for me

Let PQR be an equilateral triangle, centered at O. A point X is chosen at random inside the triangle. Find the probability that X is closer to O than to any of the sides. (In read more ..

Guest Jan 24, 2023

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205

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Counting

How to get started on this

Find the number of ways of placing 4 balls in 5 boxes if the balls are distinguishable and the boxes are indistinguishable.

Guest Jan 24, 2023

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211

0

Probability

Help meee hard problems

Valeria has three coins, each of which has a probability of 1/2 of coming up heads. On her first turn, she flips all three coins. If all three come up heads, then she stops. Otherwise, for her second turn, read more ..

Guest Jan 24, 2023

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238

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Counting problem

What do I do here

Sam wants to color the three sides of an equilateral triangle. He has two different colors to choose from. In how many different ways can Sam color the sides of the triangle? (Two colorings are read more ..

Guest Jan 24, 2023

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219

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Counting

Help I need this

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 3

Guest Jan 24, 2023

0

237

2

Precalc Help Plz Help ASAP

Let theta be an angle such that cos(theta) = -1/9 and 0 <= theta <= 2pi.

Assume that cos(theta/2) < 0. Then if:
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Guest Jan 24, 2023

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213

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Algebra

Plz help answers needed quick!

A magician makes potions by combining maple syrup from a magical maple tree with ordinary water. The magician starts with a large supply of two potions: a red potion, which is 50% magical syrup by volume read more ..

Guest Jan 24, 2023

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247

3

+660

The equation describes the height y (in feet) at time t (in seconds) of a ball tossed up in the air at 28 feet per second from a height of

The equation describes the height y (in feet) at time t (in seconds) of a ball tossed up in the air at 28 feet per second from a height of 144 feet from the ground. In how many seconds will the ball hit the ground?

Keihaku Jan 24, 2023

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240

2

Counting

Help with these hard counting

Let n be a positive integer. Let k be a positive integer.
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Guest Jan 24, 2023

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199

0

Complex numbers

help need help with this

Describe all solutions to zw - 3w - 2iw + 4z = 7iw + 5w + 11iz - 13 + 15i
where z and w are complex numbers.

Guest Jan 24, 2023

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248

1

Counting

Help I need this

There is a group of five children, where two of the children are twins. How many ways can I distribute 10 identical pieces of candy to the children, if the twins must get an equal amount of candy? read more ..

Guest Jan 24, 2023

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197

1

Math

8y-2(y+4) simplify

Guest Jan 24, 2023

+1

206

1

+19

HELP ME PLZ

Sewing patterns recommend buying extra fabric in case of mistakes. Jessica bought 5 yards of fabric, plus 20% extra fabric.
Derek bought 3 yards of fabric, plus 25% extra. Who bought more fabric? How much more?

LIzzie6348 Jan 24, 2023

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222

0

Sequences

Need lots of help on 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? read more ..

Guest Jan 24, 2023

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220

0

Counting

I need help

Find the number of positive integers that satisfy the following conditions:
* Each digit is a 1 or a 2 or a 3 read more ..

Guest Jan 24, 2023

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213

0

Binomial Theorem

Help I need to use the binomial theorem somehow

(a) Simplify (n/k)/(n/(k - 1))
read more ..

Guest Jan 24, 2023

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201

0

Counting

How to solve this

Find the number of ways of placing 4 balls in 6 boxes if the balls are indistinguishable and the boxes are indistinguishable.

Guest Jan 24, 2023

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217

0

Probability

Help this hard

We define a bow-tie quadrilateral as a quadrilateral where two sides cross each other. An example of a bow-tie quadrilatera is shown below. distinct points are chosen on a circle. We draw all read more ..

Guest Jan 24, 2023

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207

1

30% of 45

what is 30%of 45

Guest Jan 24, 2023

0

226

1

what is the value of i^i

Guest Jan 24, 2023

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240

0

HELP

You purchase x items for $4 each. Explain how the variable in the expression 4x and the variable in the equation 4x=20 are similar. Explain how they are different.

Guest Jan 24, 2023

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228

0

Algebra

Help me I have tried everything

Let a and b be real numbers such that a^3 + 3ab^2 = 679 and a^3 - 3ab^2 = 673. Find a - b.

Guest Jan 24, 2023

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