All Questions

406

Probability

A point P is randomly selected from the square region with vertices at $(\pm 1, \pm 1)$. What is the probability that P is within one unit of the origin? Express your answer as a common fraction in terms of pi.

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Guest Nov 27, 2021

400

pls help

suppose that 3^a=2 and 3^v=5. If 3^x=150, then write an expression for x in terms of a and b.

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Guest Nov 27, 2021

266

Probability

A point (x,y) is randomly selected such that 0 <= x <= 3 and 0 <= y <= 8. What is the probability that x + y <= 4? Express your answer as a common fraction.

Guest Nov 27, 2021

255

Probability

There are 3 math clubs in the school district, with 5, 7, and 8 students respectively. Each club has two co-presidents. If I randomly select a club, and then randomly select four members of that club to give a copy of Introduction to Counting and Probability, read more ..

Guest Nov 27, 2021

280

Polynomial

Find a monic polynomial of degree 4, in x, with rational coefficients such that sqrt(2) + sqrt(5) is a root of the polynomial.

Guest Nov 27, 2021

324

Number Theory

What is the sum of the final three digits of the integer representation of 58^{100}?

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Guest Nov 27, 2021

412

answer is 10 but why???!

anyone knows?

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Guest Nov 27, 2021

425

answer is (ax10) +b or something else????

(a.10) + b right

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Guest Nov 27, 2021

307

Number Theory

The proper divisors of 12 are 1, 2, 3, 4 and 6. A proper divisor of an integer N is a positive divisor of N that is less than N. What is the sum of the proper divisors of the sum of the proper divisors of 280?

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Guest Nov 27, 2021

457

+63

Squaring a square root?

Okay, I stumbled upon a question that eventually led to this, can someone please help me out? Thank you.

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Ooflord Nov 27, 2021

311

Modular Arithmetic

How many integers n satisfy 0 < n < 60 and 4n=6 (mod 7)

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Guest Nov 27, 2021

311

Modular Arithmetic

What is the units digit of $3^{2^{1000}} + 1$? (The 1000th Fermat prime)

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Guest Nov 27, 2021

448

A bag contains 9 hazelnuts, 10 almonds and 5 walnuts. If 6 are drawn at random, what is the probability all six will be the same nut?

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Guest Nov 27, 2021

312

Interest

Joseph borrows $10000 from his sister Katie at an annual interest rate of 10%. If the interest is compounded twice a year, how much does he owe after 24 months? Give your answer in dollars.

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Guest Nov 27, 2021

291

Number Theory

The Lucas sequence is the sequence 1, 3, 4, 7, 11,... where the first term is 1, the second term is 3 and each term after that is the sum of the previous two terms. What is the remainder when the 100th term of the sequence is divided by 20?

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Guest Nov 27, 2021

380

Geometry

Lines AB and CD intersect at a point O in such a way that ∠DOB = 5∠COB. What is ∠AOD?

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Guest Nov 27, 2021

404

trig problem

In right triangle ABC, angle B is 90 degrees. If tan C = 2. Find cos A. No caculator

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Guest Nov 27, 2021

302

Counting

How many multiples of 9 are between 100,000 and 100,185?

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Guest Nov 27, 2021

331

help probability

Rolling four standard dice, what is the probability that the product of the four results is even and a multiple of 3?

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Guest Nov 27, 2021

416

+99

MATH HELP PLS

Can someone please help me on this math problem

Given FIND read more ..

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Jxalskdfjarkfhqwio3r Nov 27, 2021

361

Polygon problem

In concave equilateral pentagon ABCDE, angle A = angle B = 100 degrees. What is the degree measure of E?

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Guest Nov 27, 2021

408

Algebra problem

Noah was asked to compute the product of two numbers. He misread the problem and entered the sum of the two numbers instead. Luckily he still got the right answer. One of the two numbers is 6. What is the other number?

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Guest Nov 27, 2021

302

Probability

A card is chosen at random from a standard deck of 52 cards. What is the probability that it is a King or spade (or both)?

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Guest Nov 27, 2021

Nov 26, 2021

242

help with Algebra

Let x represent the sum of the first 25 positive odd integers. Let y represent the sum of the next 25 positive even integers. What is the value of y - x?

Guest Nov 26, 2021

253

Counting question

Ten people are sitting around a round table. Three of them are chosen at random to give a presentation. What is the probability that at least two of the three chosen people were sitting in consecutive seats?

Guest Nov 26, 2021

All Questions ⁺⁰237665 Questions

Probability

pls help

Probability

Probability

Polynomial

Number Theory

answer is 10 but why???!

answer is (ax10) +b or something else????

Number Theory

Squaring a square root?

Modular Arithmetic

Modular Arithmetic

A bag contains 9 hazelnuts, 10 almonds and 5 walnuts. If 6 are drawn at random, what is the probability all six will be the same nut?

Interest

Number Theory

Geometry

trig problem

Counting

help probability

MATH HELP PLS

Polygon problem

Algebra problem

Probability

help with Algebra

Counting question

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