All Questions ⁺⁰237808 Questions

+1

750

1

probability help

Dimitri places the maximum possible number of Rooks on a 8 by 8 chessboard in such a way that there's no two Rooks that attack each other. In how many ways can he do that?

Guest Dec 28, 2019

0

790

1

help

In the figure below, there are 6 squares: 4 small, 1 medium (in blue), and 1 large. There are 9 circles, which will be filled with all the integers 1 through 9 such that the sum of the vertices of each square is 20.

What read more ..

Guest Dec 28, 2019

0

469

1

help

Find all acute angles x such that cos(3x)*cos(x) + sin(3x)*sin(x) = cos(3*pi/5).

Guest Dec 28, 2019

Dec 27, 2019

0

1505

1

Help!

The graphs of and are drawn. For every , a vertical segment connecting these two graphs can be drawn as well. Find the smallest possible length of one of these vertical segments.

Guest Dec 27, 2019

0

818

3

help please

Four mathematicians, three physicists, and an engineer are to be seated equally spaced around a circular table. How many different arrangements are possible if the mathematicians must all sit together (in four consecutive seats) and the physicists must read more ..

Guest Dec 27, 2019

0

424

0

help

The number is a root of x^3 + ax^2 + bx + c = 0, for some integers a, b, and c. Find the ordered triple (a,b,c).

Guest Dec 27, 2019

-1

841

1

+152

Help

What is the value of c if x(3x+1) \(x\in \left(-\frac{7}{3},2\right)\)

BIGChungus Dec 27, 2019

+8

1026

6

+394

Factorials

1. The number obtained from the last two nonzero digits of 2019! is equal to 𝑛𝑛. What is 𝑛𝑛?

2. The number obtained from the last two nonzero digits of 2019! is equal to 𝑛𝑛. What is 𝑛𝑛?

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hellospeedmind Dec 27, 2019

0

874

3

help

Solve sqrt(a) + b = 7, sqrt(b) + a = 11

Guest Dec 27, 2019

0

837

2

help

A yellow circle circumscribes a green regular hexagon and is inscribed in a red regular hexagon.
What is the ratio of the areas of the green hexagon to the red hexagon?

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Guest Dec 27, 2019

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476

0

help

he 2 green points in the diagram are the midpoints of 2 adjacent sides of a regular hexagon.
Which is larger, the red area or the blue area?

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Guest Dec 27, 2019

0

2

784

1

help

A polyhedron has 30 faces and 62 edges. How many vertices does the polyhedron have?

Guest Dec 27, 2019

0

1359

1

+24

Please Help! Thank you.

1. A regular dodecagon is inscribed in a circle with radius 1. Compute
(The sum includes all terms of the form , where )

2. In the diagram, , arc XY is , and arc VW is . Find arc WY, in degrees. (view diagram) read more ..

Elen8 Dec 27, 2019

0

803

1

+24

View Question - Help. Thank you.

1. In cyclic quadrilateral PQRS, angle P/2 = angle Q/3 = angle R/4. Find the largest angle of quadrilateral PQRS, in degrees.

Elen8 Dec 27, 2019

0

964

1

PLZ HELP THX

Two jokers are added to a 52 card deck and the entire stack of 54 cards is shuffled randomly. What is the expected number of cards that will be strictly between the two jokers?

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Guest Dec 27, 2019

0

1625

2

Help

Lance has a regular heptagon (7-sided figure). How many distinct ways can he label the vertices of the heptagon with the letters in OCTAGON if the N cannot be next to an O ? Rotations of the same labeling are considered equivalent.

Guest Dec 27, 2019

0

495

2

help

What is the number of integers greater than 6000 that can be formed using the digits 3,5,6,7 and 8 without repetition?

Guest Dec 27, 2019

+1

1114

1

+312

COUNTING & PROBABILITY

It is a beautiful day at the beach and ten beach volleyball players have shown up at the volleyball courts. Each two-person volleyball team should consist of a setter and a spiker. Five of the players prefer to be a spiker, four of the players prefer to read more ..

mathleteig Dec 27, 2019

0

749

1

help

Solve sqrt(4x - 3) + 10/sqrt(4x - 3) = 7.

Guest Dec 27, 2019

0

744

2

help

Area shaded region of the triangle ABC is 80 sq. units, what is the area of triangle ABC?

Guest Dec 27, 2019

0

654

1

help

Let n be a positive integer.
(a) Prove that
by counting the number of ordered triples (a,b,c) where in two different ways.
(b) Prove that
by counting the number of subsets of containing three different numbers in read more ..

Guest Dec 27, 2019

+1

796

2

help

A rhombus is inscribed in a circle with radius r and center O such that one of the vertices lies on O and rest lie on the circumference of the circle.
Find the area of the rhombus in terms of r.
read more ..

Guest Dec 27, 2019

-1

861

2

+152

Help

1)A parabola with equation y=ax^2+bx+ccontains the points (3,-3), (1,3), and (0,0) Find the value 100a+10b+c
2) In terms of pi, what is the area of the circle defined by the equation 2x^2+2y^2+10x-6y-18=0
I'm sorry for giving out read more ..

BIGChungus Dec 27, 2019

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