All Questions ⁺⁰237827 Questions

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172

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Coefficient

Find the coefficient of y^4 in the expansion of (2y - 5 + y^2)^6.

Guest Jan 15, 2023

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168

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Arrangements

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 15, 2023

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160

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help probability

The Boomtown Bears are playing against the Tipton Toros in a baseball tournament. The winner of the tournament is the first team that wins three games. The Bears have a probability of of winning each game. Find the probability that the Bears win the tournament. read more ..

Guest Jan 15, 2023

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230

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+96

For $z = -3 + 5i,$ evaluate $z \overline{z}.$

I know you use the conjugate but I'm pretty confused after that

coolkidslovemath1982 Jan 15, 2023

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223

2

+96

Im confused i tried the power thing but how do you compute at the end

Compute i+i^2+i^3.....i^258+i^259

coolkidslovemath1982 Jan 15, 2023

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174

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sin /cos

Guest Jan 15, 2023

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248

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Find the area of a regular 12-gon inscribed in a unit circle.

Find the area of a regular 12-gon inscribed in a unit circle.

Guest Jan 15, 2023

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183

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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
* each row contains the numbers 1, 2, 3, and 4 in some order
* each column contains the numbers 1, 2, 3 and 4 in some order
* each 2 read more ..

Guest Jan 15, 2023

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186

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Fractions

Levans writes a positive fraction in which the numerator and denominator are integers, and the numerator is 1 greater than the denominator. He then writes several more fractions. To make each new fraction, he increases both the numerator and the denominator read more ..

Guest Jan 15, 2023

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200

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Probability

In the SuperLottery, three balls are drawn (at random, without replacement) from white balls numbered from 1 to 12, and one SuperBall is drawn (at random) from red balls numbered from 13 to 20. When you buy a ticket, you choose three numbers from 1 to 12, read more ..

Guest Jan 15, 2023

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175

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help with geometry

Let ABC be a triangle, and let its angle bisectors be AD, BE, and CF, which intersect at I. If DI = 3, BD = 4, and BI = 8, then find the area of triangle ABC.

Guest Jan 15, 2023

Jan 14, 2023

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170

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Sequence

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 Jan 14, 2023

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172

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just curious

why did this user get banned?
https://web2.0calc.com/members/helpppp/?

Guest Jan 14, 2023

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212

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help

find 4 consecutive integers that sum to 374

Guest Jan 14, 2023

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182

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counting problem

In how many ways can the numbers 1 through 5 be entered once each into the five boxes below so that all the given inequalities are true?

Guest Jan 14, 2023

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178

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Binomials

Expand (sqrt(t) + 3t + 1)^3 + (sqrt(t) - 3t + 1)^3.

Guest Jan 14, 2023

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200

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Counting problem

Find the number of positive integers that satisfy the following conditions:
* Each digit is a 1 or a 2 or a 3
* The sum of the digits is 10

Guest Jan 14, 2023

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172

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Algebra

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 14, 2023

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175

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Algebra

Let a and b be real numbers such that a + b = 4 and a^4 + b^4 = 16.
(a) Find all possible values of ab
(b) Find all possible values of a + b
(c) Find all possible values of a and b

Guest Jan 14, 2023

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