All Questions ⁺⁰237740 Questions

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275

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Factors

How many natural-number factors does N have if N=2^4*3^8*5^2*7^2?

Guest Jun 4, 2022

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316

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help quadratic

Find all solutions to the equation x^2 - 7x = 30 + 5x.
If you find more than one, then list the values separated by commas. If the solutions are not real, then they should be written in a + bi form.

Guest Jun 4, 2022

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224

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Proportion

The value of y varies inversely as and when x=24, y=15. What is x when y=3?

Guest Jun 4, 2022

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304

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Algebra

I pick two whole numbers x and y between 1 and 10 inclusive (not necessarily distinct). My friend picks two numbers x -4 and 3y-1. If the product of my friend's numbers is one greater than the product of my numbers, then what is the product of my numbers? read more ..

Guest Jun 4, 2022

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306

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Algebra question

Find all solutions to the equation 6x^2 - 31x + 40 = 4x^2 - 28x + 30. If you find more than one, then list the values separated by commas. If the solutions are not real, then they should be written in a + bi form.

Guest Jun 4, 2022

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293

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Factor the expression

Factor,

I've tried factoring it normally like taking out ab,bc,ca and then using difference of squares. Or taking a out of the first and last, b etc. And then using difference of cubes. But I can't seem to factor it any further.
I read more ..

Guest Jun 4, 2022

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269

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It is given that z1= 3 cis (3π/4) and z2= 2 cis (nπ/16), n∈ℤ+

It is given that z1= 3 cis (3π/4) and z2= 2 cis (nπ/16), n∈ℤ+
(a) In parts (a)(i) and (a)(ii), give your answers in the form r e iθ, r≥ 0 , read more ..

Guest Jun 4, 2022

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323

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Average

A class of 30 students recently took a test. If 20 students scored 80, 8 students scored 90, and 2 students scored 94, then what was the class average (the mean) on this test?

Guest Jun 4, 2022

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336

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plz help

If f(x) = 2/x + 1, then what is the value of f(-1/5)

Guest Jun 4, 2022

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277

1

Help please

Box A contains 350 black stones and 500 white stones. Box B contains 400 black stones and 100 white stones. How many black stones and white stones must be moved from Box B to Box A so that 50% of the stones in Box A are black and 75% of the stones in Box read more ..

Guest Jun 4, 2022

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276

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LCM

Three athletes Kayden, Chander and Karin start a race around a circular field. They take 90 seconds, 120 seconds and 150 seconds respectively to complete around. Find the time they will be at the same point if they started the race at 7:15 a.m. read more ..

Guest Jun 4, 2022

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313

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Counting problem

The product of the digits of 3214 is 24. How many distinct four-digit positive integers are such that the product of their digits equals 24?

Guest Jun 4, 2022

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345

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Function

The function f is defined by f(n) = f(n − 1) + f(n − 2). It is also true that f(1) = 3 and f(2) = 10. What is the value of f(6)

Guest Jun 4, 2022

Jun 3, 2022

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306

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help geometry

Line m is parallel to line n and the measure of angle 1 is the measure of angle 2. What is the degree measure of angle 5?

Guest Jun 3, 2022

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215

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quadratic

The amount of money a certain company makes can be represented by the graph y = x^2 - 18x - 33 , where x is the quantity produced. What is the smallest quantity at which the company can produce to break even or make a profit?

Guest Jun 3, 2022

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268

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Algebra

Krzysztof solved the quadratic equation 11x^2+44x-99=0 by completing the square. In the process, he came up with the equivalent equation (x+r)^2 = s,where r and s are constants.What is r+s.

Guest Jun 3, 2022

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320

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Complex Numbers

Let a and b be distinct complex numbers on the unit circle. Find the maximum possible value of |a - b|.

Guest Jun 3, 2022

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355

4

HELP IMMEDIATELY

A circle is centered at O and has an area of 48pi. Let Q and R be points on the circle, and let P be the circumcenter of triangle QRO. If P is contained in triangle QRO, and triangle PQR is equilateral, then find the area of triangle PQR.
read more ..

Guest Jun 3, 2022

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278

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Number Theory

An integer n is said to be square-free if the only perfect square that divides n is 1^2. How many positive odd integers greater than 1 and less than are square-free?

Guest Jun 3, 2022

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232

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Rational function - need help

A rectangle is inscribed in a circle of radius r. If the rectangle has length 3x, write the area of the rectangle as the product of two functions.

Guest Jun 3, 2022

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287

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Algebra

Rationalize the denominator of $\frac{1}{\sqrt{2} + \sqrt{5} + \sqrt{7}}$.

Guest Jun 3, 2022

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270

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Algebra

San Francisco is approximately 60 miles from San Jose. John’s family travelled from San Francisco to San Jose averaging 40 miles per hour, but on the way back, due to heavy traffic, they only averaged 20 miles per hour. What is the average speed of the read more ..

Guest Jun 3, 2022

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272

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Algebra problem

Tony and his grandma went hiking together. Grandma was slow but steady and maintained the same speed throughout. Tony accompanied grandma at her pace forthe first 30 minutes. Then he walked ahead for the next 20 minutes at 4 miles an hour. And the next read more ..

Guest Jun 3, 2022

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