All Questions ⁺⁰238000 Questions

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help

Guest Feb 14, 2023

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Coordinates

A median of a triangle is a line segment joining a vertex of a triangle to the midpoint of the opposite side. The three medians of a triangle are drawn below.

Note that the three medians appear to intersect at the same point! Let's read more ..

Guest Feb 14, 2023

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167

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Counting

In how many ways can 5 balls be placed in 5 boxes if the balls are distinguishable, and the boxes are indistinguishable?

Guest Feb 14, 2023

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180

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Counting

How many ways are there to put 5 balls in 2 boxes if the balls are not distinguishable but the boxes are?

Guest Feb 14, 2023

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193

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number with googleplex zerows

what is a number with a one folowd with a googleplex zerows?

Guest Feb 14, 2023

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206

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Counting

Help how do I count this

Find the number of six-digit numbers, where the sum of the digits is divisible by 8. read more ..

Guest Feb 14, 2023

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178

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Counting

Plz I need help

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

Guest Feb 14, 2023

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181

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Counting

When two standard 6-sided dice are rolled, there are 36 possible outcomes for the sum of the two rolls: one sum of 2, two sums of 3, and so on, up to one sum of 12.

Find all possible ways of numbering two 6-sided dice read more ..

Guest Feb 14, 2023

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183

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Geometry

Plz help with geometry problem

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 14, 2023

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189

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Geometry

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 OA = 1, OB = 1, OC = 1. Show that the read more ..

Guest Feb 14, 2023

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193

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Counting

Help plz with this

There are 97 students in South High School. South High School offers only Chinese and Spanish. There are more students in Chinese than in Spanish, and every student takes at least one language. If students read more ..

Guest Feb 14, 2023

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181

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Exponential Functions

Help the class didn't cover this

Each graph below is the graph of an exponential function of the form ka^x (where a > 0). Match each graph with the correct option.

Guest Feb 14, 2023

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161

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Counting

I need help with counting

In the olympic women's skating competition, the gold medal goes to first place, silver to second, and bronze to third. If there are skaters, including Americans, in how many ways can the medals be awarded read more ..

Guest Feb 14, 2023

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179

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Binomial

Need help with binomial

The function f(n) satisfies
binom(2n)n - binom(2n + 1)(2n) = f(n) *binom(2n + 1)(n + 1) read more ..

Guest Feb 14, 2023

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183

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Exponential Functions

Need help with graphs

The graph of the exponential function f(x) is shown below. Find f(x).

Guest Feb 14, 2023

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Help counting

Sam writes down the numbers 1, 2, 3, ..., 99

(a) How many digits did Sam write, in total?
(b) Sam chooses one of the digits written down, at random. What is the probability that Sam chooses a 0?
(c) What is the sum of all the read more ..

Guest Feb 14, 2023

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177

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Algebra

Help I need help with this equation

Find all real numbers x such that
(3^x - 27)^3 + (27x - 3*3) = (3x + 27x - 30 + 27*3) read more ..

Guest Feb 14, 2023

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175

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Counting

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?

Guest Feb 14, 2023

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179

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Counting

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 Feb 14, 2023

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175

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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 Feb 14, 2023

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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 Feb 14, 2023

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183

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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.
read more ..

Guest Feb 14, 2023

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198

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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 Feb 14, 2023

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166

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Counting

I need help right away

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 read more ..

Guest Feb 14, 2023

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