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If two real numbers have a sum of 8 and a product of 14. What is the sum of their reciprocals?

Guest Jun 12, 2020

596

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1. What is the value of the modulus of 6−4i?
Enter your answer as a simplified radical in the box.

2. How is multiplying 3−2i by i2 represented on the complex plane? read more ..

Guest Jun 12, 2020

773

Pre-calculus questions (please answer urgently if you can!)

Let f(x)=x+2x^2+3x^3+4x^4+5x^5+6x^6 , and let S=[f(6)]^5+[f(10)]^3+[f(15)]^2. Compute the remainder when S is divided by 30.

mikeyosefj Jun 12, 2020

676

PLEASE ANSWER QUICK

off-topic

Prove that there exists a positive integer N such that there are at least 2005 ordered pairs (x, y) of non-negative integers x and y, satisfying x^2+y^2=N.

Guest Jun 12, 2020

546

please help! due today

Let f be defined by . Calculate .

I tried solving this...to find , then I'd need to find the x that makes f(x) equal to 0, right? So I solved both equations for 0, for 3-x, x=3. For , x can be 0, -1, or 3. But after read more ..

Guest Jun 12, 2020

627

Let f be defined by . Calculate .

I run a book club with n people, not including myself. Every day, for 365 days, I invite five members in the club to review a book. What is the smallest positive integer n so that I can avoid ever having the exact same group of five members read more ..

Guest Jun 12, 2020

942

HELP PLZ

1300=1344.63709595+1.73251550T+0.00058844T^2+0.00011503T^3

Guest Jun 12, 2020

595

find the value of the constant

plz help urgently help appreciated

Guest Jun 12, 2020

579

hlp equation

plz help onyl the top one

Guest Jun 12, 2020

607

plz help due today

What is the unit digit of the following product:

684 * 59 * 413 * 76

Guest Jun 12, 2020

660

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Guest Jun 12, 2020

579

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Find X + Y.

If 3^x = 5 and 5^y = 9, then find xy.

Guest Jun 12, 2020

696

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Billy is playing the board game, Tactical Naval Exercises. Admiral Billy has 120 battleships, 96 fast-attack submarines, and 168 paddle boats. Billy plans to deploy all of his ships by separating them into as many identical smaller fleets as possible. How read more ..

Guest Jun 12, 2020

670

+308

healeaelp

The area of rectangle ABCD is 40, with AB = 8. M is the midpoint of AB, and N lies on CD such that CN = 2. Find the area of quadrilateral MBCN.

notsmart2.0 Jun 12, 2020

-1

1036

Explain how a marshland could prevent flooding in a nearby town.

off-topic

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Guest Jun 12, 2020

706

help please

A carpenter is working on a deck. He hires two assistants who work 60% as fast as he works. If all three work together on the deck, they should finish in what fraction of the time that he would take working alone?

Guest Jun 12, 2020

436

help

Guest Jun 12, 2020

760

i need some help on this..

If , what is the exact value of ? Express your answer as a common fraction.

The positive integer x satisfies (10! + 11! + 12!)/10! = x^2. Find x.

Guest Jun 12, 2020

420

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In the figure, angle ABC and angle ADB are each right angles. Additionally, AC = 17.8 units and AD = 5 units. What is the length of segment DB? read more ..

Guest Jun 12, 2020

815

Help!

A bag contains five white balls and four black balls. Your goal is to draw two black balls.

b)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. read more ..

Guest Jun 12, 2020

661

+80

I need small help

The sequence a_n satisfies a_0 =1 and for n > 0. Find a_{100}.

Sarvajit Jun 12, 2020

472

help

A side of one equilateral triangle is congruent to an altitude of another equilateral triangle. What is the ratio of their areas?

Guest Jun 12, 2020

715

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