All Questions

370

Please Help

Find

Thanks! read more ..

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Guest Apr 5, 2021

270

13.9=442250/Y(1-1/(1+y)^10)+14.5/(1+y)^10

Guest Apr 5, 2021

373

algebra

If a and b are the solutions to the equation x^2 - 5x + 19 = 0, what is the value of (a - 1)(b - 1)?

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Guest Apr 5, 2021

Apr 4, 2021

510

counting

At a particular school with 43 students, each student takes chemistry, biology, or both. The chemistry class is three times as large as the biology class, and 8 students are taking both classes. How many people are in the chemistry class?

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Guest Apr 4, 2021

604

PLS HELP ME SMART PEOPLE!!!

A stick has a length of $5$ units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are shorter than $2$ units?

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Guest Apr 4, 2021

537

+487

More Using Geometry in Probability

A point $P$ is randomly selected from the square region with vertices at $(\pm2, \pm2)$. What is the probability that $P$ is within one unit of the origin? Express your answer as a common fraction in terms of $\pi$.

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RiemannIntegralzzz Apr 4, 2021

487

+487

Using Geometry in Probability

A point $(x,y)$ is randomly selected such that $0 \leq x \leq 3$ and $0 \leq y \leq 6$. What is the probability that $x + y \leq 4$? Express your answer as a common fraction.

Please show your work!!!

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RiemannIntegralzzz Apr 4, 2021

472

Can you help me please?

I need help finding the perimeter

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Guest Apr 4, 2021

492

+487

Expected Value

In a lottery, a ticket costs $3$ dollars, and the jackpot is worth $250000$ dollars. In all, $100000$ tickets are sold, one ticket is randomly drawn, and the winner is awarded the jackpot. What are the expected winnings in dollars of buying one read more ..

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RiemannIntegralzzz Apr 4, 2021

1025

+487

Combination Probability

There are 3 math clubs in the school district, with 5, 7, and 8 students respectively. Each club has two co-presidents. If I randomly select a club, and then randomly select three members of that club to give a copy of Introduction to Counting and read more ..

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RiemannIntegralzzz Apr 4, 2021

396

Percent

Our basketball team has finished 80% of its season, during which we won 48% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses? read more ..

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Guest Apr 4, 2021

629

Complex Plane

In the complex plane, the line segment with end-points -11 + 3i and 3 - 7i is plotted in the complex plane. Find the complex number corresponding to the mid-point of this line segment.

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Guest Apr 4, 2021

423

Find all values of r such that

Find all values of r such that (r - 3)/sqrt(r) = -2*sqrt(r).

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Guest Apr 4, 2021

280

HELP ASAP!!!!!

Let X, Y and Z be points such that xz/yz=zy/xy=1/2. If xy=(1,7), z=(-1,-7) then what is the sum of the coordinates of X?

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Guest Apr 4, 2021

500

+29

What is triganometry

This is more of a general question. I should know this but I'm in 7th grade and haven't learned this. Could someone explain.

off-topic

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fuhsaha Apr 4, 2021

428

+30

Algebra

Let f(x) = 16x + 3. Find the sum of all x that satisfy the equation f-1(x) = f((2x)-1).

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justchillin Apr 4, 2021

341

HALP ASAP PLS!!!!!

A stick has a length of $5$ units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are shorter than $2$ units?

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Guest Apr 4, 2021

474

+132

Some Algebra

Let k be a real number, such that both roots of x^2 - 2kx + k^2 + k - 5 = 0 are real, and they are less than 5. Find all possible values of k.

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macar0ni Apr 4, 2021

293

help asap pls

Compute 12121_3 * 1222_3 in base 3
Note: 12121_3 means 12121 base 3

nvm got it! for anyone wondering what the answer is it's 101222102_3!! :) read more ..

Guest Apr 4, 2021

878

HALP ASAP PLS NOW

Eight women of different heights are at a party. Each woman decides to only shake hands with women shorter than herself. How many handshakes take place?

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Guest Apr 4, 2021

422

scientific notation

Photons of red light have a wavelength of approximately 7*10^(-7) meters. The energy of a photon is inversely proportional to its wavelength. A photon with 8000 times the energy as a photon of red light will have a wavelength that can be written as a*10^b read more ..

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Guest Apr 4, 2021

366

Algebra

Grady rides his bike 60% faster than his little brother Noah. If Grady rides 15 miles further than Noah in two hours, how fast in miles per hour does Noah ride?

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Guest Apr 4, 2021

356

Algebra

In a 10-kilometer race, each runner runs 5 km to point P and returns to the start by the same route. Ian runs 4 kilometers per hour faster than Sean. Ian runs to point P, turns around, and meets Sean 3 km from the start. Assume that Ian and Sean each maintain read more ..

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Guest Apr 4, 2021

457

+46

Urgent, please help!

Let X, Y, and Z be points such that XZ/ZY = ZY/XY = 1/2. If Y = (1, 7), Z = (-1, -7), then what is the sum of the coordinates of X?

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VoidAsks Apr 4, 2021

541

+106

Probability question

Kaylee has 2 gallons each of red and blue paint, and 1 gallon each of orange and green paint. She paints her bedroom with these jars of paint. If she uses $\frac{2}{3}$ of the red paint, $\frac{1}{4}$ of the blue paint, $\frac{1}{2}$ of the orange paint, read more ..

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TealSeal Apr 4, 2021

All Questions ⁺⁰234925 Questions

Please Help

13.9=442250/Y(1-1/(1+y)^10)+14.5/(1+y)^10

algebra

counting

PLS HELP ME SMART PEOPLE!!!

More Using Geometry in Probability

Using Geometry in Probability

Can you help me please?

Expected Value

Combination Probability

Percent

Complex Plane

Find all values of r such that

HELP ASAP!!!!!

What is triganometry

Algebra

HALP ASAP PLS!!!!!

Some Algebra

help asap pls

HALP ASAP PLS NOW

scientific notation

Algebra

Algebra

Urgent, please help!

Probability question

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