All Questions ⁺⁰237644 Questions

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190

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Help! Thank you! :)

Consider the complex numbers on the unit circle below:

Put the complex numbers in order of increasing magnitude, and enter read more ..

Guest Feb 6, 2023

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201

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Geometry

Right triangle XYZ has legs of length XY = 12 and YZ = 6. Point D is chosen at random within the triangle XYZ. What is the probability that the area of triangle XYD is at most 20?

Guest Feb 6, 2023

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165

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Geometry

Need help with geo

(1) In tetrahedron ABCO, angle AOB = angle AOC = angle BOC = 90^\circ. A cube is inscribed in the tetrahedron so that one of its vertices is at O, and the opposite vertex lies on face ABC. Let OA read more ..

Guest Feb 6, 2023

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174

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Counting

Plz help with counting

Miyu is giving out 9 identical chocolates to her 7 friends, including Dhruv. All possible distributions are equally likely. What is the probability that Dhruv gets exactly 2 chocolates? read more ..

Guest Feb 6, 2023

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195

2

In how many ways can 4 balls be placed in 4 boxes if the balls are indistinguishable, and the boxes are distinguishable?

In how many ways can 4 balls be placed in 4 boxes if the balls are indistinguishable, and the boxes are distinguishable?

Guest Feb 6, 2023

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166

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Probability

I need help with probability

Valeria has three coins, each of which has a probability of 1/2 of coming up heads. On her first turn, she flips all three coins. If all three come up heads, then she stops. Otherwise, for her second read more ..

Guest Feb 6, 2023

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172

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Algebra

How do I do this

Find the constant term in the expansion of (2z - 1/(z*sqrt(z)) + 1)^4.

Guest Feb 6, 2023

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226

2

Help please

I don't think this problem is that hard, but I can't get it.

A standard six-sided die is rolled twice. What is the probability that the product of the rolls is 1, 2, or 3?

Guest Feb 6, 2023

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157

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Help now!

A coin is tossed 12 times. How many different sequences of tosses could there have been, if the number of heads was at least 10?

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Guest Feb 6, 2023

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187

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Counting

Help with grid

Each unit square of the 4 x 4 grid below is to be filled in with the number 1, 2, 3 or 4 so that read more ..

Guest Feb 6, 2023

Feb 5, 2023

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169

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Counting

Plz anyone help with counting

(a) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends. (Not everyone has to get a sticker.)
read more ..

Guest Feb 5, 2023

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241

2

Algebra

Help how do I solve this system

Let a and b be real numbers such that a^3 + 3ab^2 = 679 and a^3 - 3ab^2 = 673. Find a - b.

Guest Feb 5, 2023

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172

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Probability

Plz help with probability problem

In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the problem. read more ..

Guest Feb 5, 2023

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173

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Geometry

Can anyone help with parallelogram

In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the problem. read more ..

Guest Feb 5, 2023

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152

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Geometry

I have problem with tangent circes

The two circles below are externally tangent. A common external tangent intersects line PQ at R. Find QR.

Guest Feb 5, 2023

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165

0

Geometry

I need help plz

Let AB be a diameter of a circle, and let C be a point on the circle such that AC=8 and BC=4 The angle bisector of ACB intersects the circle at point M Find CM.

Guest Feb 5, 2023

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165

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Coefficients

How to compute coefficients

Find the coefficient of y^4 in the expansion of (2y - 5 + y^2)^6.

Guest Feb 5, 2023

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157

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Counting

I need the answer here

Find the number of ways of choosing three points from the grid below, so that they form an isosceles right triangle.

Guest Feb 5, 2023

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160

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Counting

Help me with this

Find the number of solutions to
x_1 + x_2 + x_3 + x_4 + x_5 + x_6 + x_7 + x_8 + x_9 + x_10 <= 2 read more ..

Guest Feb 5, 2023

+1

200

1

+1662

Plz help Im stuck

I'm not sure how to set up the equations here. Can anyone be of assistance?

A magician makes potions by combining maple syrup from a magical maple tree with ordinary water. The magician starts with a large supply of two potions: read more ..

wiseowl Feb 5, 2023

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210

2

HELP DUE TONIGHT

In triangle $PQR,$ $M$ is the midpoint of $\overline{PQ}.$ Let $X$ be the point on $\overline{QR}$ such that $\overline{PX}$ bisects $\angle QPR,$ and let the perpendicular bisector of $\overline{PQ}$ intersect $\overline{PX}$ at $Y.$ If $PQ = 36,$ $PR = 22,$ read more ..

Guest Feb 5, 2023

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202

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PLEASE HELP DUE TODAY!!

Let $ABC$ be a triangle, and let its angle bisectors be $\overline{AD},$ $\overline{BE},$ and $\overline{CF},$ which intersect at $I.$ If $DI = 3,$ $BD = 4,$ and $BI = 5,$ then compute the area of triangle $ABC.$ (please include explanation if possible) read more ..

Guest Feb 5, 2023

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