All Questions

602

What is the question mark?

Guest Aug 26, 2018

576

Help

Line m has the equation y = 3x + 5. Line n has the equation y = kx - 7. Lines m and n intersect at the point (-4, -7). What is the value of k?

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Guest Aug 26, 2018

1984

+1246

Sequenses

Two arithmetic sequences A and B both begin with 30 and have common differences of absolute value 10, with sequence A increasing and sequence B decreasing. What is the absolute value of the difference between the 51st term of sequence read more ..

dierdurst ●●●

Lightning Aug 26, 2018

524

Help me plz

Jack rolls 5 fair six-sided dice. What is the probability that at least two dice show the same number?
please help quickly

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Guest Aug 26, 2018

846

+90

Stuck at this question :(

Let 𝑎 = 6, 𝑏 = 10, 𝑐 = 4 and 𝑑 = 9. Find a permutation μ so that
(𝑎𝑏𝑐𝑑) = 𝜇(1234)𝜇^-1

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Yousif.m Aug 26, 2018

711

+90

Help please!

A left coset may arise with various names. For example in S3 the subgroup
{e, (12)} gives rise to
(13){𝑒, (12)} = {(13), (123)} = (123){𝑒, (12)}
a case with 2 distinct names. read more ..

Yousif.m Aug 26, 2018

628

Probability stuff

A box contains 5 white balls and 6 black balls. Five balls are drawn out of the box at random. What is the probability that they all are white?

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Guest Aug 26, 2018

611

+20

math help

thank you for the help
read more ..

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gakinotsukai Aug 26, 2018

675

+20

algebra help

is this correct?

read more ..

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gakinotsukai Aug 26, 2018

1917

+87

Geometry question and inequality

Let line L1 be the graph of 5x+8y=-9 . Line L2 is perpendicular to line L1 and passes through the point (10,10) . If line L2 is the graph of the equation Y=mX+b , then find m+b I have a large truck and my neighbor has four read more ..

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thunderkirby Aug 26, 2018

1416

+8262

Math

Are there two integers with a product of -12 and a sum of -3? Explain.

I said no, but how do I explain?

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DragonSlayer554 Aug 26, 2018

1404

+96

help

In a roomful of 30 people, what is the probability that at least two people have the same birthday? Assume birthdays are uniformly distributed and there is no leap year complication.

Melody ●

Olpers Aug 26, 2018

1123

+96

A pair of fair, standard dice are rolled. What is the probability the sum of the dice is 5?

dierdurst ●

Olpers Aug 26, 2018

4342

+96

Price Problem

Nona went shopping to buy some new school clothes. At the first store she bought two pairs of pants, each originally priced $30. Nona used a coupon that reduced the price of each item by 15%, and then a 5% sales tax was applied to the new subtotal. What read more ..

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Olpers Aug 26, 2018

1318

+1246

Series

If only the positive integers from 1 through 49, inclusive, are written on a piece of paper, what is the sum of all the digits that are written on the paper?

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Lightning Aug 26, 2018

815

+1246

Arithmrtic Series

A sequence with is defined by the recurrence relation for all natural numbers n. If , then what is p?

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Lightning Aug 26, 2018

892

+1246

Arithmetic Sequence

Let be an arithmetic sequence. If , what is ?

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Lightning Aug 26, 2018

Aug 25, 2018

679

+818

Band Problem!!!!

A band is marching in a rectangular formation with dimensions n-2 and n+8. In the second stage of their performance, they re-arrange to form a different rectangle with dimensions n and 2n-3 , excluding all the drummers. If there are read more ..

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mathtoo Aug 25, 2018

-1

563

help!

We have triangle where and is an altitude. Meanwhile, is a point on such that If and the area of is what is the area of ?

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Guest Aug 25, 2018

641

+818

Circle, Radius

Try to use the circle formula!
For what value of c will the circle with equation have a radius of length 4?

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mathtoo Aug 25, 2018

713

+818

Is this it?

Let (x,y) be an ordered pair of real numbers that satisfies the equation . What is the minimum value of x?

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mathtoo Aug 25, 2018

749

the power per square metre is 200µW m-2.

At 150m from the antenna of a cellular base station in open country, measurements show that the power per square metre is 200µW m-2. What power per square metre could be expected at 300m from the base station? Show your working and explain any assumptions read more ..

Guest Aug 25, 2018

2361

+239

question

There are 30 cars in my building's parking lot. All of the cars are red or white, and a car can have either 2 doors or 4 doors. 1/3 of them are red, 50% of them are 4-door, and 8 of them are 2-door and white. How many of the cars are 4-door and red? read more ..

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Firewolf Aug 25, 2018

712

Pascal's triangle

Let f(n) be the base-10 logarithm of the sum of the elements of the nth row in Pascal's triangle. Express in terms of n.
Please help fast!

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Guest Aug 25, 2018

893

Distinguishability

How many ways are there to put 4 balls in 3 boxes if the balls are distinguishable but the boxes are not?
I could use some help!

CPhill ●●●●●●●●●●●●●●●●●

Guest Aug 25, 2018

All Questions ⁺⁰237665 Questions

What is the question mark?

Help

Sequenses

Help me plz

Stuck at this question :(

Help please!

Probability stuff

math help

algebra help

Geometry question and inequality

Math

help

A pair of fair, standard dice are rolled. What is the probability the sum of the dice is 5?

Price Problem

Series

Arithmrtic Series

Arithmetic Sequence

Band Problem!!!!

help!

Circle, Radius

Is this it?

the power per square metre is 200µW m-2.

question

Pascal's triangle

Distinguishability

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