All Questions

825

+23

help please!

From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that age remains constant of around 2.1 years. A survey of 40 smokers of this generation was done to see if the mean starting age is read more ..

hiya12345 Apr 14, 2019

822

+51

Geometry Proof Help

Could one of this site's math Wizards please help me with this. The teacher wants me to make a 2 column proof that proves this and I am kind of read more ..

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OkNietzsche Apr 14, 2019

555

Fraction question

How do you simplify 10 22/24 ?

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Guest Apr 14, 2019

746

Problem of the Week: Lettuce for Sale

On Monday, the produce manager stocked the display case with eighty heads of lettuce. By the end of the day some of the lettuce had been sold.

On Tuesday, the manager surveyed the display case and counted the number of heads of lettuce read more ..

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Guest Apr 14, 2019

816

+1246

How did -3i\bar{z} become -3b-3ia?

How did become -3b-3ia? When I expanded it, I got ?

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Lightning Apr 14, 2019

947

+1246

Help!

Determine the complex number satisfying the equation i.

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Lightning Apr 14, 2019

686

Help

Let $z$ be a complex number such that z^5 + z^4 + 2z^3 + z^2 + z = 0. Find all possible values of |z|.

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Guest Apr 14, 2019

-1

988

+34

Yeet

Square ABCD has side length 7. What is the length of the diagonal AC?

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ColtPatterson Apr 14, 2019

810

help

Let . If is a polynomial in such that for all , then find .

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Guest Apr 14, 2019

663

I really need help on question number 13!!!

This is a geometry find the area question so I attached a link to the pdf where I got it from it's number 13 on page 2 chapter 11 read more ..

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Guest Apr 14, 2019

943

+1246

Help!

Determine the complex number z satisfying the equation . Note that denotes the conjugate of z.

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Lightning Apr 14, 2019

890

+322

Integrals

f' ''(x)= 5 + cos(x) , f(0) = -1 , f(9pi/2) = 0

Find f(x).
read more ..

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Ruublrr Apr 14, 2019

850

+1246

I got \sqrt{1/4+r^2}?

Let r be a real number, |r| < 2, and let z be a complex number such that Find |z|.

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Lightning Apr 14, 2019

863

Suppose a game of 3-D tic tac toe...

Suppose a game of 3-D tic tac toe is played on a 6 by 6 by 6 cube. How many winning lines are there through the cube?

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Guest Apr 14, 2019

581

Help with 2 questions

1) Find the square roots of 3+4i. Express each root in the form a+bi, where a and b are real numbers.]\
I got 2+i but that is incorrect can someone tell me where I went wrong?
2) What is the area of the region of the complex plane read more ..

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Guest Apr 14, 2019

778

HELP PLEASE

Let
Find a+b if the piecewise function is continuous (which means that its graph can be drawn without lifting your pencil from the paper).

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haihaihai Apr 14, 2019

Apr 13, 2019

702

Define the operation by . What is ?

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Guest Apr 13, 2019

1074

Please help

1) The complex numbers a and b satisfy
Find

2) Suppose z is a complex number such that z^2 = 24-32i. Find |z|. read more ..

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Guest Apr 13, 2019

1496

The decimal expansion

The decimal expansion of 1/13 has a period of six digits. Find all primes p for which 1/p has a period of exactly four digits.

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Guest Apr 13, 2019

808

The number 4

The number 4 can be expressed as the sum of one or more natural numbers in eight different ways if order matters:

4 1+3 2+2 3+1 1+1+2 1+2+1 2+1+1 1+1+1+1 read more ..

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Guest Apr 13, 2019

710

+217

Help

Thanks!

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Rudram592 Apr 13, 2019

4406

+422

Help

A rectangular prism with a volume of 4 cubic units is filled with cubes with side lengths of 1/3 unit. How many 1/3 unit cubes does it take to fill the prism?

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APatel Apr 13, 2019

837

+217

Help!

Thanks!

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Rudram592 Apr 13, 2019

846

+217

Help!

Thanks!

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Rudram592 Apr 13, 2019

All Questions ⁺⁰238471 Questions

help please!

Geometry Proof Help

Fraction question

Problem of the Week: Lettuce for Sale

How did -3i\bar{z} become -3b-3ia?

Help!

Help

Yeet

help

I really need help on question number 13!!!

Help!

Integrals

I got \sqrt{1/4+r^2}?

Suppose a game of 3-D tic tac toe...

Help with 2 questions

HELP PLEASE

Define the operation by . What is ?

Please help

The decimal expansion

The number 4

Help

Help

Help!

Help!

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