All Questions ⁺⁰237827 Questions

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168

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Counting

I have too many of counting problems

Let n be a positive integer. Let k be a positive integer.
read more ..

Guest Feb 4, 2023

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190

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Counting

I need help quick

A standard six-sided die is rolled 7 times. You are told that among the rolls, there was one 1, two 2's, and three 4's. How many possible sequences of rolls could there have been? (For example, read more ..

Guest Feb 4, 2023

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189

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Fractions

How do you solve this problem its hard

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 read more ..

Guest Feb 4, 2023

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199

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Probability

Helpppp mmmeeee on this

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 read more ..

Guest Feb 4, 2023

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169

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Counting

Help with counting plz

At a meeting, five scientists, two mathematicians, five journalists, two biologists, and three politicians are to be seated around a circular table. How many different arrangements are possible read more ..

Guest Feb 4, 2023

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169

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Counting

Help how to use combinations

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 Feb 4, 2023

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178

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System

I have a hard time with this system

For a certain value of k, the system read more ..

Guest Feb 4, 2023

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178

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Geometric Probability

Need help with this

Right triangle XYZ has legs of length XY = 12 and YZ = 6. Point D is chosen at random within the triangle XYZ. What is the probability that the area of triangle XYD is at most ?

Guest Feb 4, 2023

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182

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Precalc

I need help with parametric equations

The position of a particle is given by the parametric equations
x = 1 + sin pi*t - cos pi*t read more ..

Guest Feb 4, 2023

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170

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Geometry

`Plz help I'm bad at 3d

(1) In tetrahedron ABCO, angle AOB = angle AOC = angle BOC = 90^\circ. A cube is inscribed in the tetrahedron so that one of its vertices is at O, and the opposite vertex lies on face ABC. Let read more ..

Guest Feb 4, 2023

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161

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Geometry

Can anyone help

Points X, Y, and Z are on the sides QR, PR, and PQ, respectively, of right triangle PQR such that PZXY is a square. If PQ = and PR = , then what is the side length of the square?

Guest Feb 4, 2023

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173

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Counting

Need the answer for this

We call a number cozy if every digit in the number is either even or next to an even digit. For example, a number is cozy if every digit in the number is either a 2 or next to read more ..

Guest Feb 4, 2023

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164

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Counting

Help plz hep meeeee

At a meeting, five scientists, two mathematicians, five journalists, two biologists, and three politicians are to be seated around a circular table. How many different arrangements are possible read more ..

Guest Feb 4, 2023

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166

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Counting

Help what to do here

Catherine rolls a 6-sided die five times, and the product of her roll is . How many different sequences of rolls could there have been? (The order of the rolls matters.)

Guest Feb 4, 2023

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158

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Counting

I need help with this plz help

There are 18 padded chairs around a circular table, and the chairs are numbered from 1 through 18 . How many ways can five people take their seats, so that no two people are adjacent? read more ..

Guest Feb 4, 2023

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158

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A five-digit number is chosen at random from all possible five-digit numbers.

A five-digit number is chosen at random from all possible five-digit numbers. Find the probability that the number is NOT divisible by every element of (1,2,3,4,5,6)

Guest Feb 4, 2023

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171

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Counting

Help I dont get this

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 Feb 4, 2023

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217

1

Probability

Help I need the answer

A member of the junior varsity swim team will be elected as President. Each member is equally likely to be elected. The probability that a sophomore is elected is the probability that read more ..

Guest Feb 4, 2023

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172

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Probability

Need help with a probability stuff

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 read more ..

Guest Feb 4, 2023

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176

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triangle

I need help with a triangle

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 Feb 4, 2023

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190

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Radicals with Imaginary Numbers

Guest Feb 4, 2023

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167

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Binomials

How to work with binomials

Fill in the blanks to make the equation true. (Each blank should contain a 2-digit number)
read more ..

Guest Feb 4, 2023

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176

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Combo

I need help plz

(a) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends. (Not everyone has to get a sticker.)
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Guest Feb 4, 2023

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183

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geometry

I need help with this plz

In triangle PQR, M is the midpoint of PQ. Let X be the point on QR such that PX bisects angle QPR, and let the perpendicular bisector of PQ intersect AX at Y. If PQ = 36, PR = 22, QR read more ..

Guest Feb 4, 2023

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215

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The length of a rectangle is 6 yds longer than its width. If the perimeter of the rectangle is 48 yd, find its area.

The length of a rectangle is 6 yds longer than its width. If the perimeter of the rectangle is 48 yd, find its area.

Guest Feb 4, 2023

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