All Questions +0 230450 Questions

A television and DVD player cost a total of $1192 . The cost of the television is three times the cost of the DVD player. Find the cost of each item.

Guest Dec 1, 2019

-1

688

help

Let H be the hyperbola with foci at +/-(5, 0) and vertices at +/-(3, 0), and let C be the circle with center (0,0) and radius 4. Given that H and C intersect at four points, what is the area of the quadrilateral formed by the four points? read more ..

Guest Dec 1, 2019

-1

806

help

Solve system 4x - 9y = -21, 4x + 3y = -9. Give a complete explanation for all your steps!

Guest Dec 1, 2019

-1

383

help

Find all integers a and b such that a^2 + b^2 = 400.

Guest Dec 1, 2019

-1

377

help

Guest Dec 1, 2019

703

+143

Func. & Ineq.

Define

and
read more ..

AoPS.Morrisville Dec 1, 2019

950

In right triangle DEF, we have sin D = 5/13 and sin E = 1. Find sin F.

Guest Dec 1, 2019

137

In right triangle DEF, we have sin D = 5/13 and sin E = 1. Find sin F.

Guest Dec 1, 2019

378

Solving and Factorising

a^5 divided by a^3

Jenny goes hiking every 15 days and swimming every 6 days. She did both kinds of exercise today. How many days from now will she go both hiking and swimming again if today is January 8th read more ..

Guest Dec 1, 2019

816

Question

Let a, b, c be real number such that a + b + c = 5 and 1/(b + c) + 1/(c + a) + 1/(a + b) = 6. Find a/(b + c) + b/(c + a) + c/(a + b).

Guest Dec 1, 2019

671

help

The quadratic has two imaginary roots. What is the sum of the squares of these roots? Express your answer as a decimal rounded to the nearest hundredth.

Guest Dec 1, 2019

537

Please help ASAP

Krishanu and Shaunak each pick an integer at random between 1 and 10, inclusive. What is the probability that the product of their numbers is more than 10? Express your answer as a common fraction.

Guest Dec 1, 2019

1401

help pls

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Guest Dec 1, 2019

-1

712

help

A bag contains five white balls and five 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 probability read more ..

Given: BC || DE
Angle D is Congruent to angle B
Prove: AB || CD
read more ..

Guest Dec 1, 2019

745

+1712

GEOMETRY

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tommarvoloriddle Dec 1, 2019

1726

help

Mahowny rolls two fair, six-sided dice. You don't know what the rolls were, but you are told that the sum of the two rolls is a prime. What is the probability that the sum of the two rolls is 7?

Find the number of five-digit positive integers such that the digits are alternately odd and even (either odd-even-odd-even-odd or even-odd-even-odd-even)

Guest Dec 1, 2019

521

help

Why in n(n+1)/2 do you divide by 2

Guest Dec 1, 2019

949

Curious

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Guest Dec 1, 2019

763

+101

help please

An ellipse has foci at (0,2) and (3,0). The ellipse has two x-intercepts, one of which is the origin. What is the other x-intercept? (Remember to enter your answer as an ordered pair.)

Thanks for your help! read more ..

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chclt363 Dec 1, 2019

555

help

Jack wants to write down some of the numbers from 1 to 100 on a piece of paper. He wants to do it in such a way, that no two numbers on the piece of paper will add up to 125. How many numbers, at most, can Jack write down on his piece of paper? read more ..

What function equation is represented by the graph?
https://prnt.sc/q4fojz
f(x)=−2x+3
f(x)=2/3x−2 read more ..

Guest Dec 1, 2019

Nov 30, 2019

526

math

1. Can I please have a proof where you prove something is a square, along with an answer?
2. Can I please have a proof where you prove something is a rectangle, along with an answer?

Thank you! read more ..

Guest Nov 30, 2019

885

Geometric Proofs

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Guest Nov 30, 2019

953

find the average value of the function g(x)=2sin(x)+e^(x/pi) on the interval 0, (2pi)

What is the multiple of 3541 when all the digits are ones(1s)? Thanks for help.

Guest Nov 30, 2019

659

Multiples of 3541