All Questions

456

Statistics

Im not understranding how to use the combination rule nCr equation. Im do not get how to calculate using the formula.

Find the probability of getting 5 face cards (king, queen, or jack) when 5 cards are drawn from read more ..

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Guest Oct 10, 2020

466

counting problem

Acme Corporation has released an alphabet soup in which each of the vowels (A, E, I, O, U) of the English alphabet appears three times (and the consonants do not appear at all). How many five-letter words can be formed from a bowl of Acme Vowel Soup? (Note: read more ..

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Guest Oct 10, 2020

499

Please help!! TYSM

Is there a possible solution to the system
0.7a + 0.2b = 0.8a + 0.8b
a = -6b
b = - (a/6) read more ..

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Guest Oct 10, 2020

512

find inverse

Please help me with this

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Guest Oct 10, 2020

548

Mark buys two wooden boards that are 7.25 feet long each. The cost of the board is $1.25 per foot, including tax. What is the total cost,

Mark buys two wooden boards that are 7.25 feet long each. The cost of the board is $1.25 per foot, including tax. What is the total cost, in dollars, of Mark’s board? Round your answer to the nearest hundredth place.Round your answer read more ..

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Guest Oct 10, 2020

598

algebra

Fill in the blank with a constant, so that the resulting constant can be factored as the product of two linear constants:

3ab - 12a - 5b + ___

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Guest Oct 10, 2020

759

help plz

A pool measuring 8 meters by 24 meters is surrounded by a path of uniform width, as shown in the figure. If the area of the pool and the path combined is 720 square meters, what is the width of the path?

read more ..

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Guest Oct 10, 2020

456

independent practice

In addition to her salary, Ms. Lopez earns a 3% commission, or fee based on a percent of her sales, on every vacation package that she sells. One day, she sold three vacation packages shown. Fill in the table for each packages' commission. What was her read more ..

Guest Oct 10, 2020

356

algebra

Consider two positive even integers less than 19 (not necessarily distinct). When the sum of these two numbers is added to their product, how many different possible values may result?

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Guest Oct 10, 2020

532

algebra problem

Can you solve this algebraically?

There are two beakers A and B ,which are filled with acid and water in the ratio 4:3 and 5:3 respectively.In what ratio ,the mixture A and B to be mixed so that the ratio of acid and water to be 3:2 read more ..

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Guest Oct 10, 2020

517

inequality

I need help on this inequality.

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Guest Oct 10, 2020

1985

HELP ASAP PLEASE! TYSM!

A scientist has two acid solutions: Artesia, which is a 70% acid solution, and Borromeo, which is a 20% acid solution.
(a) Find the amount of Artesia (in mL) that must be added to 500 mL of Borromeo order to produce a 60% acid solution.
(b) read more ..

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Guest Oct 10, 2020

327

how tall is the statue?

Guest Oct 10, 2020

409

hard probability

What is the probability?

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Guest Oct 10, 2020

2156

+123

In the SuperLottery, three balls are drawn (at random) from ten white balls numbered from to , and one SuperBall is drawn (at random)

In the SuperLottery, three balls are drawn (at random) from ten white balls numbered from to , and one SuperBall is drawn (at random) from ten red balls numbered from to . When you buy a ticket, you choose three read more ..

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mathlete2008 Oct 10, 2020

456

AoPS Math Please review!!

$D$ is on side $\overline {AB}$ of $\triangle ABC.$ We know $\triangle ABC \sim \triangle ACD$ and $\angle A =48^\circ.$ If $BC=BD,$ what is $\angle B$ in degrees?
I know this is written in Latex but okay.
https://latex.artofproblemsolving.com/6/6/f/66f577ad40a16923c75948baa22ffbc74a4d1051.png read more ..

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Guest Oct 10, 2020

488

counting problem

How many different three-letter sets of initials are possible using the letters A through K?

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Guest Oct 10, 2020

552

how to count

Tom got a Mr. Potato Head for his birthday. It came with 3 hairstyles, 2 sets of eyebrows, 1 pair of googly eyes, 2 sets of ears, and 2 sets of lips, and a pair of regular shoes. If a complete Mr. Potato Head personality includes eyebrows, eyes, ears, lips, read more ..

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Guest Oct 10, 2020

489

need help

Arrange the numbers 2^(500), 3^(400), 4^(300), 5^(200) in increasing order.

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Guest Oct 10, 2020

431

Compute 1 - 2 + 3 - 4 + ... + 2019 - 2020.

Guest Oct 10, 2020

474

ratios

I have a bag containing red, green, blue, and white marbles and the ratio red:green:bue:white is 2:2:5:7. I have 320 marbles. How many blue marbles do I have?

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Guest Oct 10, 2020

493

help please

What is angle BXE?

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Guest Oct 10, 2020

621

+155

HELP ASAP PLEASE!!!!!

Consider the polynomial P(x) = x^4 + 3x^3 + 5x^2 + 7x + 9. Let its four roots be a, b, c, d. Evaluate the expression (a + b + c)(a + b + d)(a + c + d)(b + c + d).

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EvanWei123 Oct 10, 2020

494

algebra problem

Consider the equation

(4x^3 + 2x^ 2+ 10x + 9)/(2x + 1) = 2x^2 + 5 + 4/(2x + 1)
a) Show that this equation is true when x = 10
b) Explain why this equation is not true when x = -1/2.
c) Show that this equation is true for read more ..

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Guest Oct 10, 2020

347

geometry

Find x.

Guest Oct 10, 2020

All Questions ⁺⁰237807 Questions

Statistics

counting problem

Please help!! TYSM

find inverse

Mark buys two wooden boards that are 7.25 feet long each. The cost of the board is $1.25 per foot, including tax. What is the total cost,

algebra

help plz

independent practice

algebra

algebra problem

inequality

HELP ASAP PLEASE! TYSM!

how tall is the statue?

hard probability

In the SuperLottery, three balls are drawn (at random) from ten white balls numbered from to , and one SuperBall is drawn (at random)

AoPS Math Please review!!

counting problem

how to count

need help

Compute 1 - 2 + 3 - 4 + ... + 2019 - 2020.

ratios

help please

HELP ASAP PLEASE!!!!!

algebra problem

geometry

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