All Questions ⁺⁰237999 Questions

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169

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Algebra

If I give my brother 5 dollars, then we will have the same amount of money. If instead he gives me dollars, then I'll have twice as much money as he will have. How much money does my brother currently have (in dollars)?

Guest Feb 24, 2023

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192

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Geometry

In triangle ABC the angle bisector of BAC meets BC at D. If angle BAC = 60, angle ABC = 60, and AD = 24, then find the area of triangle ABC.

Guest Feb 24, 2023

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191

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falculators and answers

please check my answers.

3! = 6
4! = 24
4! = 24
5! = 120
6! = 720 read more ..

Guest Feb 24, 2023

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227

4

Here is a very difficult question

Here is a very difficult question: what are the first 10 digits of "one quadrlion factorial", or "10^15!"
Thank you.

Guest Feb 24, 2023

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196

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Question

If 96.5 g of gold has a volume of 5.00 cubic centimeters, what is its density?

Guest Feb 24, 2023

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153

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please help me:

please help me:
why 1000! answer last digits are zero? help me

The factorial of 1000 is calculated as below:
n = 1000
1000! = 1000 × 999 × 998 × 997 × 996 × 995 × 994 × 993 × 992 × 991 × 990 × 989 × 988 × 987 × 986 × read more ..

Guest Feb 24, 2023

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177

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Counting

In how many ways can you distribute 10 indistinguishable balls among 8 distinguishable boxes, if at least one of the boxes must be empty?

Guest Feb 24, 2023

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170

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Counting

Need help on this plz

Find the number of ways of choosing three points from the grid below, so that they form an isosceles right triangle.

Guest Feb 24, 2023

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171

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Precalc

In triangle PQT, R is on side PT such that QR = QP. Also, QS is an altitude, and QT = 10. The values of tan CBE, tan CBE, tan SQT form an arithmetic progression, and the values of cot SQT, cot RQT, cot SQR form a geometic progression. read more ..

Guest Feb 24, 2023

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181

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Probability

A box contains 24 tiles. Each tile has certain properties:
Each tile is made of wood or plastic.
Each tile is red, yellow, or blue.
Each tile is a triangle, square, pentagon, or circle.
There is exactly one tile for each combination read more ..

Guest Feb 24, 2023

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173

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Counting

My square patio is tiled with square tiles, all the same size. All the tiles are gray, except the tiles along the two diagonals, which are all yellow. (The corners are yellow, the center is yellow, and all the tiles along the diagonal in between read more ..

Guest Feb 24, 2023

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201

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Inequality

Plz help prove this inequality

(a) Show that if a, b, c, d, e, f are nonnegative real numbers, then (a^2 + b^2)^2 (c^4 + d^4)(e^4 + f^4) >= 32abcdef.
(b) Show that if a, b, c, d, e, f are nonnegative real read more ..

Guest Feb 24, 2023

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153

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Counting

Can anyone help plz?

A debate team consists of 5 freshmen and 4 sophomores. (Everyone is distinguishable.) In how many ways can they stand in line, so at least two of the sophomores are standing next to each other, and read more ..

Guest Feb 24, 2023

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172

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Probability

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 exactly one card labeled with each number. The read more ..

Guest Feb 24, 2023

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176

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Counting

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

Guest Feb 24, 2023

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167

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y=1/2*x+b

Guest Feb 24, 2023

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229

3

I HATE SURDS

how do i do surds

Guest Feb 24, 2023

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175

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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 read more ..

Guest Feb 24, 2023

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212

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Geometry

In triangle PQR, let M be the midpoint of QR, let N be the midpoint of PR, and let O be the intersection of QN and RM, as shown. If QN perp PR, QN = 12, and PR = 14, then find the area of triangle PQR.

Guest Feb 24, 2023

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