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1161

+169

Hard Counting Problem (IMO)

An ancient human tribe had a hierarchical system where there existed one chief with 2 supporting chiefs (supporting chief A and supporting chief B), each of whom had 2 equal, inferior officers. If the tribe at one point had 10 members, what is the number read more ..

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Inspirational Aug 8, 2020

925

please help

Line MN passes through points M(4, 3) and N(7, 12). If the equation of the line is written in slope-intercept form, y = mx + b, what is the value of b?

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Guest Aug 8, 2020

557

physics

The smallest living organism discovered so far is called a mycoplasm. Its mass is estimated as 2.0 × 10–16 g. Express this in petagrams.
Help me please!!

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pacman123 Aug 8, 2020

753

Helppppp quick plz

help plz quick

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Guest Aug 8, 2020

586

Solve

Consider the rectangular region with the following points as vertices:$$(5,4), (-5,4), (-5,-4), (5,-4).$$How many points with integer coordinates will be strictly in the interior of this rectangular region?

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Guest Aug 8, 2020

1521

+980

Let ABC be a triangle with\angle BAC = 90. A circle is tangent to the sides AB and AC at X and Y respectively, such that the points

Let ABC be a triangle with\angle BAC = 90. A circle is tangent to the sides AB and AC at X and Y respectively, such that the points on read more ..

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qwertyzz Aug 8, 2020

709

+226

PLEASE HELP THANK YOU IN ADVANCED

Consider the complex numbers in the following picture, as well as the line segments connecting them to the origin:

Put the complex numbers
in read more ..

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littlemixfan Aug 8, 2020

705

algebra

How many quarters does Gisele have?

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Guest Aug 8, 2020

Aug 7, 2020

654

please help!

A 5×5×5 wooden cube was painted and then sawed into 1×1×1 cubes. How many 1×1×1 cubes have exactly two faces painted?

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Guest Aug 7, 2020

585

Polynomial math problem.

Suppose $f$ is a polynomial such that $f(0) = 47$, $f(1) = 32$, $f(2) = -13$, and $f(3)=16$. What is the sum of the coefficients of $f$? This problem has confuzzled me greatly. I have tried creating polynomials of several degrees but I am routinely getting read more ..

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Guest Aug 7, 2020

606

help for number theory proof that shows that 9x+5y is divisible by 19 if and only if x+9y is divisible by 19

Let x and y be integers. Show that 9x+5y is divisible by 19 if and only if x+9y is divisible by 19. Thanks in advance.

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Guest Aug 7, 2020

932

an answer was originally written as a photo, is there a way I can still read it?

hi, I found that a few years ago an answer to one of my questions was already answered but it seems that it was an image and is no longer avaible. Is there another way I can view it? thanks

off-topic

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Guest Aug 7, 2020

972

I am dumb so plz help

How many digits are in the value of the following expression: ?
I am dumb so help

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Guest Aug 7, 2020

692

Can you help with this question?

How many multiples of 6 are greater than -25, but less than 25?

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Guest Aug 7, 2020

745

HELP ASAP!!!

In how many ways can we form an international commission if we must choose one European country from among 6 European countries, one Asian country from among 4, one North American country from among 3, and one African country from among 7?

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Guest Aug 7, 2020

1893

line (coordinates)

Leo drew a line that is perpendicular to the line shown on the grid and passes through point (F, G). What is the equation of the line, in terms of F and G?

read more ..

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Guest Aug 7, 2020

-4

785

help pls asap due today also dont understand previous explanation

took down

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NIbberlat Aug 7, 2020

586

triangle

Find angle A.

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Guest Aug 7, 2020

590

circle

Find FG.

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Guest Aug 7, 2020

656

Please help!!!

Find the length XZ.

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Guest Aug 7, 2020

564

hard inequality

Which one is correct?

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Guest Aug 7, 2020

578

probability question

If a person is healthy. he has a 20% chance of being greater than 70 years old. If a person is greater than 70 years old, he has an 85% chance of being healthy. Suppose 15% of the citizens in a city are greater than 70 read more ..

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Guest Aug 7, 2020

671

please help

Solve this system.

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Guest Aug 7, 2020

All Questions ⁺⁰237665 Questions

Hard Counting Problem (IMO)

please help

physics

Helppppp quick plz

Solve

Let ABC be a triangle with\angle BAC = 90. A circle is tangent to the sides AB and AC at X and Y respectively, such that the points

PLEASE HELP THANK YOU IN ADVANCED

algebra

please help!

Polynomial math problem.

help for number theory proof that shows that 9x+5y is divisible by 19 if and only if x+9y is divisible by 19

an answer was originally written as a photo, is there a way I can still read it?

I am dumb so plz help

Can you help with this question?

HELP ASAP!!!

line (coordinates)

help pls asap due today also dont understand previous explanation

triangle

circle

Please help!!!

hard inequality

probability question

please help

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