All Questions ⁺⁰237635 Questions

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866

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Help

In how many ways can I arrange 3 different math books and 5 different history books on my bookshelf, if I require there to be a math book on both ends?

Oofrence ●●

Guest Oct 15, 2019

0

618

1

Gonna need some help with this

Find all real numbers T such that (2/3)t - 1 < t + 7 ≤ -2t + 15.

Thanks, read more ..

Guest Oct 15, 2019

+1

925

3

+220

help plz

A bacterial culture is growing exponentially, and its mass increases from 2 mg to 5 mg in 30 hours. Find the mass of the culture after 25 hours.

Oofrence Oct 15, 2019

+1

909

1

+220

help

Find if tan = 5/12 and is in Quadrant III.

Oofrence Oct 15, 2019

0

784

4

+220

A few questions i need answering on

1. The graphs of and intersect at only one point. What is the value of x?
I think you should do x^2 + 2x + 7 = 6x + b, but i don't know how to continue
2. Find all pairs (x, y) such that
I dont' know read more ..

Oofrence Oct 15, 2019

0

705

1

+1982

Record your calculations under 'Annual income' in the table

For each of the professions in the left column, calculate the annual pay based on full-time, year-round employment consisting of 2,000 hours a year (40 hours per week for 50 weeks each year). Record your calculations under "Annual income" in the table read more ..

macabresubwoofer Oct 15, 2019

+46

4

5471

14

+130511

HAPPY BIRTHDAY, HECTICTAR !!!

She is one of the best "answerers" on this site [ even though she IS from Alabama....well.....everyone can't be perfect !!!! (Hehehe!!) ]
read more ..

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CPhill Oct 15, 2019

Oct 14, 2019

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755

1

+143

Define the function q(y)=w/1-y. If q(-1)=q^-1(4w+1), what are all the possible values of w.

Define the function q(y)=w/1-y. If q(-1)=q^-1(4w+1), what are all the possible values of w.

AoPS.Morrisville Oct 14, 2019

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1336

4

+143

Parabolas Practice Problem - MATHCOUNTS

Let P be the parabola in the plane determined by the equation y=x^2. Suppose a circle C intersects P at four distinct points. If three of these points are (-28,784),(-2,4)&(13,169) find the sum of the distances from the focus of P to all four read more ..

AoPS.Morrisville Oct 14, 2019

0

933

3

+143

Quadratic Equation Simplification

Krzysztof solved the quadratic equation by completing the square. In the process, he came up with the equivalent equation where r and s are constants.
What is r+s?

Found the root: . Don't understand read more ..

AoPS.Morrisville Oct 14, 2019

+2

1337

21

+119

Please help, quick!

There are 20 chairs numbered from 1 through 20 around a circular table. How many ways can three people be seated, so that no two people are adjacent?

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OlympusHero Oct 14, 2019

+1

736

1

Need help please!

I’m stuck with this question can someone help me please. Thank you.

Guest Oct 14, 2019

0

728

1

HELP PLZ

Find all values of z such that {3-z}/{z+1} ≥ 1. Answer in interval notation.

Guest Oct 14, 2019

0

689

1

+14

Please Help

In right triangle with , we have and . Find .

Herp2derp Oct 14, 2019

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