All Questions

424

probability

When rolling two standard cubes (6-sided die), what is the probability that you roll sum of 11? Convert your answer to decimal form, then round to 3 decimal places

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Guest Mar 6, 2021

340

Hard Probability Question

A real number is chosen at random such that . What is the probability that ?

I have no idea how to do this, can someone please help?

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Guest Mar 6, 2021

399

find the volume of the cone

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Guest Mar 6, 2021

372

cone and cylinder

Suppose you fill the cone with water and empty the water into the cylinder. how many times will you empty the water from the cone into the cylinder.

read more ..

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Guest Mar 6, 2021

373

circles

Two circles have the same center (Circles which have the same center are called concentric.) The larger circle has radius 10 and the smaller circle has radius 5. Determine the area of the ring between these two circles.
read more ..

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Guest Mar 6, 2021

393

+15

Pls help

The parabolas defined by the equations $y=-x^2-x+1$ and $y=2x^2-1$ intersect at points $(a,b)$ and $(c,d)$, where $c\ge a$. What is $c-a$? Express your answer as a common fraction.

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Superpotato Mar 6, 2021

435

+230

help pls

For real numbers $x$, let
\[f(x) = \left\{
\begin{array}{cl}
x+2 &\text{ if }x>3, \\
2x+a &\text{ if }x\le 3.
\end{array} <#> \right.\]
What must the value of $a$ be to make the piecewise function continuous (which read more ..

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wizzymath Mar 6, 2021

416

+230

hey hey help pls

Given that $m \angle A= 60^\circ$, $BC=12$ units, $\overline{BD} \perp \overline{AC}$ and $m \angle DBC = 3m \angle ECB$, the length of segment $EC$ can be expressed in the form $a(\sqrt{b}+\sqrt{c})$ units where $b$ and $c$ have no perfect-square read more ..

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wizzymath Mar 6, 2021

371

Algebra

Here's an algebra question-

Find b and c given that:
and read more ..

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Guest Mar 6, 2021

500

+230

help me pls

If an arc of $45^{\circ}$ on circle $A$ has the same length as an arc of $30^{\circ}$ on circle $B$, then what is the ratio of the area of circle $A$ to the area of circle $B$? Express your answer as a common fraction.

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wizzymath Mar 6, 2021

284

Help Please!

Find a quadratic with leading term such that the roots are one more than the coefficients.

(The coefficients of are b and c)

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Guest Mar 6, 2021

472

+237

Funny question

Here's a little problem I've thought about, see if you can solve it.

You like to eat out at a certain restaurant. On the first day you have a 50% chance of eating there. Every day afterwards, if you ate at the restaurant the read more ..

AvenJohn Mar 6, 2021

460

Probability

Hello,
Daniel has a box of 20 colored beads that are all the same size but are 20 different colors. Daniel will take out one bead at a time at random and without replacement. If the first bead Daniel removes from the box is gold, what is the probability read more ..

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ravenclaweirdo Mar 6, 2021

346

Partition Property of Numbers

I've been toying around with the following idea in my head for a while, and have never managed to come up with a counter-example, but I'm not sure if the following is true:
Suppose you have a list of positive integers. If one of the numbers in the list read more ..

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Guest Mar 6, 2021

471

vector matrix

Every vector can be expressed uniquely in the form , where is a scalar multiple of , and is a scalar multiple of Find the matrix such that for all vectors .
read more ..

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Guest Mar 6, 2021

287

Matrices

Let w = . There exists a matrix such that for all 2-dimensional vectors . Find .

I'm not really sure where to start for this problem. Should I plug w into the projection formula? read more ..

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Guest Mar 6, 2021

-1

398

+218

Here's the question:

Here's the question:

Brad mixes seeds to attract birds. His Blue mix is 55% sunflower and 45% bluegrass. His Rye mix
is 30% sunflower and 70% ryegrass. His Master mix combines some of each of the Blue and Rye mixes.
If Master read more ..

MathyGoo13 Mar 6, 2021

416

triangle

The length of one side of a triangle is 3 feet less than twice the length of its second side. The third side is 2/3 of the sum of the lengths of the first 3 sides. Find the length of all three sides if the perimeter is 6.5

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Guest Mar 6, 2021

298

geometry

In the diagram, K, O and M are the centers of the three semi-circles. Also, OC = 32 and CB = 30 .
What is the length of AC?

read more ..

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Guest Mar 6, 2021

417

PLZ HELP THX IN ADVANCE

Suppose is a polynomial such that , , , and . What is the sum of the coefficients of ?

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nicpro1 Mar 6, 2021

601

+92

pls help thx

Compute the number of distinct paths not passing through point (2,2,2) that travel from point (0,0,0) to (4,4,4) in 12 steps, increasing a coordinate by 1 at each step.

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AaronWang2004 Mar 6, 2021

550

+92

Pls help thx

Determine the number of 10-digit decimal numbers such that the digits that are odd are increasing from left to right, and the digits that are even are decreasing from left to right.

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AaronWang2004 Mar 6, 2021

487

integers n

Find all integers n such that n^3 = (n - 1)^3 + 37.

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Guest Mar 6, 2021

452

factor

Factor 180x^3 - 245x*y^2.

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Guest Mar 6, 2021

610

complex numers

William Sydney Porter tried to perform the calculation (3 + 4i)/(1 - 2i). However, he accidentally missed the minus sign, finding (3 + 4i)/(1 + 2i) = 11/5 - 2/5*i.
.
What answer should he have obtained?

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Guest Mar 6, 2021

All Questions ⁺⁰235595 Questions

probability

Hard Probability Question

find the volume of the cone

cone and cylinder

circles

Pls help

help pls

hey hey help pls

Algebra

help me pls

Help Please!

Funny question

Probability

Partition Property of Numbers

vector matrix

Matrices

Here's the question:

triangle

geometry

PLZ HELP THX IN ADVANCE

pls help thx

Pls help thx

integers n

factor

complex numers

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