All Questions ⁺⁰237690 Questions

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184

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how to use the scientific calculator

how to read the scientific calculator

Guest Feb 22, 2023

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212

1

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 22, 2023

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158

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Counting

I don't know how to count

In a regular decagon, the sides are to be colored with five different colors, so that sides are diametrically opposite have the same color. (Not all five colors need to be used.) One possible read more ..

Guest Feb 22, 2023

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112

1

What is the difference between contangent and sine?

cotangent vs sine

Guest Feb 22, 2023

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208

3

HELLP FASTTT PLSSS

IF the number of seats in a row in a movie theatre is 8 more than the number of rows, and there are 884 seats, how many rows are there?

Guest Feb 22, 2023

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161

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Algebra

Help this is hard

Let S be the set of all real numbers of the form
a1/3 + a2/3^2 + a3/3^3 + ....
where a_i \in {0, 1, 2} for all i. read more ..

Guest Feb 22, 2023

Feb 21, 2023

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156

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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 21, 2023

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163

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Counting

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

Guest Feb 21, 2023

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153

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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 21, 2023

+2

129

5

+187

Probability

In an animal shelter with 30 animals, each of which is either a cat or a dog, 12 out of 15 dogs have long fur and 11 out of 15 cats have long fur. What is the probability that in a randomly selected group of five animals from the shelter, there will be read more ..

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idontknowhowtodivide Feb 21, 2023

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154

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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 21, 2023

-1

160

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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 21, 2023

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152

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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 21, 2023

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192

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Counting

A speech class has five freshmen and four sophomores. (Everyone is distinguishable.) In how many ways can they stand in line, so that at least four of the freshmen are standing next to each other?

Guest Feb 21, 2023

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191

1

Counting

I have 5 different mathematics textbooks and 2 different psychology textbooks. In how many ways can I place the 9 textbooks on a bookshelf, in a row, if there must be a mathematics textbook in the middle?

Guest Feb 21, 2023

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173

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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 21, 2023

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159

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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 21, 2023

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182

1

Counting

I don't know how

In a row of five squares, each square is to be colored either red, yellow, or blue, so that no two consecutive squares have the same color, and at lest three of the squares are red. How many ways are there to read more ..

Guest Feb 21, 2023

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174

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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 21, 2023

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170

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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 21, 2023

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162

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Function

I don't get this

Let F(x) be the real-valued function defined for all real x except for x = 1 and x = 2 and satisfying the functional equation
F(x) + F((2x - 3)/x) = x.
Find the function F(x) satisfying these read more ..

Guest Feb 21, 2023

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170

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Write an exponential equation in the form y = abx whose graph passes through points (4, 8) and (6, 32).

Write an exponential equation in the form y = abx whose graph passes through points (4, 8) and (6, 32).
y = 2(0.5)x
y = 4(8)x
y = 0.5(2)x read more ..

Guest Feb 21, 2023

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161

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Algebra

Find all solultions of the equation |x^2 - 30x - 1| + |x^2 - 30x + 1| = 30.

Guest Feb 21, 2023

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175

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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 21, 2023

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