Tom K.

04/08/20

Geometry Word problem

The height of a triangle is 11 inches more than twice the length of the base. If the area of the triangle is 108 square inches, find the base and height of the triangle.

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Answers •4

Probability

04/08/20

suppose you play a game G in which you roll 100 dice, and the payoff is the number of dice that come up " 6 ." What is the variance of this game?

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Probability

03/23/20

Q: A sophomore class has 100 students sitting in a theater, 40% are girls. A blindfolded person picks 10 students at random from the class. The first 7 were boys, the next 2 were girls. What is the... more

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Probability

03/23/20

Question: Bayes Theorem: Pack of Cards

A card from a pack of 52 cards is lost. From the remaining cards of the pack, two cards are drawn one by one, without replacement and are found to be both kings. Find the probability that the lost... more

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Algebra 2 College Algebra

03/19/20

Find a possible formula for the quadratic function whose graph has a vertex (6,3) and y-intercept -8.

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Answers •2

Statistics

03/18/20

Statistics 3302

Anne gets an average of 19 text messages during her 8 hour work day. What is the probability that Anne will get more than 6 text messages in a 3 hour portion of her work day?

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Answers •1

Statistics

03/18/20

Statistics 3302

Kevin, a traffic engineer for a metropolitan public transportation service, computes that there is an average of 212 subway delays per 30-day period. Find the probability that there are 200 delays... more

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Answers •1

Statistics

03/18/20

Statistics 3302

Bryan is performing data entry for an insurance company by taking handwritten records and entering them into the database. Thus far, 18.4% of the handwritten records have had missing data that... more

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Answers •1

Math Calculus Algebra

03/14/20

please prove : if A and B are both invertible then is the matrix A+B invertible too ?

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Finite Math

03/11/20

Let A, B, and C be subsets of a universal set U and suppose n(U) = 200, n(A) = 27, n(B) = 29, n(C) = 33, n(A ∩ B) = 5, n(A ∩ C) = 10, n(B ∩ C) = 13, and n(A ∩ B ∩ C) = 4. Compute:

(a) n[A ∩ (B ∪ C)](b) n[A ∩ (B ∪ C)c]

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Statistics

03/05/20

probability math word problem

A particular system is composed of four machines: A, B, C, and D. The entire system will work as long as any one (or more than one) of the four machines works. (With back up).P(A works) = 0.60P(B... more

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Statistics

03/04/20

What is the probability between 175 and 200 homes?

A group of realtors estimates that 23% of all homes purchased last year were considered investment properties. If a sample of 800 homes sold last year is obtained, what is the probability that... more

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Geometry

03/04/20

A circle has a circumference of 6 It has an arc of length 1/3. What is the central angle of the arc, in degrees?

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Answers •1

Calculus Newton's Law Of Cooling

03/04/20

Using Newton's Law of Cooling to examine the temperature of porridge

Freshly cooked porridge starts at a temperature T(0)=100 degrees Celcius. Assume that, in the room in which the porridge sits, the temperature is 21 degrees Celcius. Assume that porridge cools... more

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Algebra 1

03/03/20

Write a polynomial equation in standard form with the given zeros -5, 2i

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Calculus

03/01/20

Calculus Question

Suppose Y= squareroot (2x+1) where x and y are functions of t. A. If find when x = 4. If dx/dt = 15, find dy/dt when x = 4.B. If find when x = 4. If dx/dt = 15, find dy/dt when x = 24

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Answers •1

Statistics Probability

02/26/20

In a class, there are 13 students. Out of those 13, 5 students are freshmen. If we pick three students, without replacement, what is the chance that at least one of them is a freshman?

1. In a class, there are 13 students. Out of those 13, 5 students are freshmen. a) If we pick three students, without replacement, what is the chance that at least one of them is a... more

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Probability

02/24/20

Dice probability

How many times do you have to roll two six-sided dice for there to be at least 50% chance that you roll two 3's at least once?

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Answers •1

Probability

12/27/19

Probability of eating free lunch

Three people go to a restaurant. Each of them has a chance to eat free if they roll the dice and win for the number they choose. Each person rolled the dice 2 times, first time for the main dish... more

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Answers •2

Algebra 2 Polynomials

12/24/19

[(x^3n)-(3x^2n)+(5x^n)-6]÷ [(x^n)-2]

Here is the question: Assuming n is a positive integer, divide [ (x^3n) - (3x^2n) + (5x^n) - 6 ]÷ [ (x^n) - 2 ]Please Show work so I can understand the solution better.

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Answers •2

Prealgebra

07/03/19

Pure acid is to be added to a 5% acid solution to obtain 95L of 9% solution. What amounts of each should be used?

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Answers •1

Trigonometry

07/02/19

Double- Angle Formulas

Solve sin2θ + cosθ = 0 for 0° ≤ θ < 180°.

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Answers •2

Statistics

06/30/19

Stats 2 question

Let X and Y be i.i.d. r.v.’s with common pdf f(t) = ( λe^(−λt), t ≥ 0, 0, otherwise. (a) . Find the joint pdf for U = X/(X + Y ) and V = X + Y . (b) Find fU (u) and fV (v). (c) Are U and V... more

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Answers •1

Statistics

06/30/19

Statistics 2 question

Let (X, Y ) have the joint pdf fX,Y (x, y) = ( 2(2x + y)/3, 0 < x < 1, 0 < y < 1, 0, otherwise. Find the pdf of Z = XY

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Math Calculus Derivative

06/30/19

Determine the point at which the graph of the function below has a horizontal tangent line. (If the function has no horizontal tangent line, enter NONE.) y = x3 + 9x

I understand the basic idea that it needs to be equal to zero and of course is horizontal, but this specific problem is a bit transfixing. It only gives the option to enter one coordinate or to... more

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Geometry Word problem

suppose you play a game G in which you roll 100 dice, and the payoff is the number of dice that come up " 6 ." What is the variance of this game?

Probability question

Question: Bayes Theorem: Pack of Cards

Find a possible formula for the quadratic function whose graph has a vertex (6,3) and y-intercept -8.

Statistics 3302

Statistics 3302

Statistics 3302

please prove : if A and B are both invertible then is the matrix A+B invertible too ?

Let A, B, and C be subsets of a universal set U and suppose n(U) = 200, n(A) = 27, n(B) = 29, n(C) = 33, n(A ∩ B) = 5, n(A ∩ C) = 10, n(B ∩ C) = 13, and n(A ∩ B ∩ C) = 4. Compute:

probability math word problem

What is the probability between 175 and 200 homes?

A circle has a circumference of 6 It has an arc of length 1/3. What is the central angle of the arc, in degrees?

Using Newton's Law of Cooling to examine the temperature of porridge

Write a polynomial equation in standard form with the given zeros -5, 2i

Calculus Question

In a class, there are 13 students. Out of those 13, 5 students are freshmen. If we pick three students, without replacement, what is the chance that at least one of them is a freshman?

Dice probability

Probability of eating free lunch

[(x^3n)-(3x^2n)+(5x^n)-6]÷ [(x^n)-2]

Pure acid is to be added to a 5% acid solution to obtain 95L of 9% solution. What amounts of each should be used?

Double- Angle Formulas

Stats 2 question

Statistics 2 question

Determine the point at which the graph of the function below has a horizontal tangent line. (If the function has no horizontal tangent line, enter NONE.) y = x3 + 9x

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