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Find all complex numbers $z$ such that $z^4 = -4.$

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Guest Jun 12, 2020

+11

684

+680

Factorials question

Given that where and are positive integers and is as large as possible, find .

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amazingxin777 Jun 12, 2020

469

help

A rhombus has sides of length 1, and an angle of 60 degrees. What is the radius of its inscribed circle?

Guest Jun 12, 2020

513

HELPMEEEEE

A bag contains five white balls and four black balls. Your goal is to draw two black balls.
You draw two balls at random. Once you have drawn two balls, you put back any white balls, and redraw so that you again have two drawn balls. What is the read more ..

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Pro12345 Jun 12, 2020

561

hi CPhill

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Guest Jun 12, 2020

740

help

Simplify

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Guest Jun 12, 2020

-1

754

+288

Help!

https://web2.0calc.com/questions/floor-function-question_1
I think (a) is ,
(b) is
and (c) is but I'm not sure. read more ..

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madyl Jun 12, 2020

443

help

Find the number of solutions to cos(x) + cos(2x) + cos(5x) = 0 for 0 <= x <= pi.

Guest Jun 12, 2020

607

Please Help me!

Find the value of n if the coefficients of x^3 and x^4 are equal in the expansion of (2x+1)^n

Any help or hints are greatly appreciated <3. read more ..

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Guest Jun 12, 2020

678

help

Anne and Brenda play a game which begins with a pile of n toothpicks. They alternate turns with Anne going first. On each player’s turn, she must remove 1, 3 or 4 toothpicks from the pile. The player who removes the last toothpick wins the game. For which read more ..

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Guest Jun 12, 2020

979

PLZ HELP ASAPP

The longer leg of a right triangle is $1$ foot shorter than twice the length of the shorter leg. The area of the triangle is $60$ square feet. What is the length of the hypotenuse, in feet?

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Guest Jun 12, 2020

-1

727

Kurwa

yes?

off-topic

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Guest Jun 12, 2020

2181

+224

Tangent question with inscribed angles. Please explain.

Lines $XTQ$ and $XUR$ are tangent to a circle, as shown below.

If and then find in degrees.

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envoy Jun 12, 2020

605

help

The figure shows a square ABCD of side 6. It contains arcs BD and AC drawn with centers at A and D, respectively. If x is the radius of the circle tangent to AB and arcs AC and BD. What is read more ..

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Guest Jun 12, 2020

581

geometry

AB is the diameter of the semicircle. C is a point on the circumference.O is the center if the semicircle.
If the radius of the semicircle is 5, ∠COA=60∘. Find the sum of the area of the region R and S. note region read more ..

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Guest Jun 12, 2020

551

help please

Find the number of ordered triples of integers (a,b,c) such that abc = 12.

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Guest Jun 12, 2020

546

help

The positive integer 10 has the property that it is the product of all its proper divisors: 10 = 1*2*5. Find all numbers between 2 and 30 that have the same property.

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Guest Jun 12, 2020

1439

+51

Hard Probability Help pls

Five journalists, two baristas, and a sailor are to be seated around a circular table. How many different arrangements are possible if the journalists must all sit together (in five consecutive seats) and the baristas must sit next to each other? (Two seatings read more ..

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trumpstinks Jun 12, 2020

552

help

If p, q, r are positive integers such that , then find q.

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Guest Jun 12, 2020

-2

848

I need help on this math question

on this one, please

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instabaddie.xo Jun 12, 2020

587

help

The Crescent Moon below is formed by two circles, both of which are tangent to each other. The point E is the center of the larger circle. If BH = 9, and AF = GC = 5AF=GC=5, what is the area of the shaded region?
read more ..

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Guest Jun 12, 2020

442

Number Theory

Can you prove that there exists 1,000,000 positive consecutive integers that are all composite numbers on the numberline, and what are they, or how do they begin and end? Thank you for help

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Guest Jun 12, 2020

624

+42

Probability confusion

For the 1st question, I'm confused about where I place the probability values on the two-way table and Venn diagram. for the 2nd question b and c, I'm confused by the wording of the question. read more ..

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matthewicee Jun 12, 2020

428

help

Solve for x in terms of b.

Guest Jun 12, 2020

All Questions ⁺⁰237795 Questions

HELP!!

Factorials question

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HELPMEEEEE

hi CPhill

help

Help!

help

Please Help me!

help

PLZ HELP ASAPP

Kurwa

Tangent question with inscribed angles. Please explain.

help

geometry

help please

help

Hard Probability Help pls

help

I need help on this math question

help

Number Theory

Probability confusion

help

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