Raymond B.

06/26/19

Why the sum of residuals equals 0 when we do a sample regression by OLS?

That's my question, I have looking round online and people post a formula by they don't explain the formula. Could anyone please give me a hand with that ? cheers

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Criminal Justice

06/24/19

What is the toughest prison in the world?

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Algebra 1 Algebra

06/21/19

The length of a rectangle is 3 feet greater than its width. The area of the rectangle is 18 square feet. What are the length and the width of the rectangle?

Please help, and clearly explain how to solve it.

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Trigonometry

06/21/19

I need help. I have tried to do this problem.

I have tried to do this problem. I want to make sure I am doing the steps and processes the right way. Solve the equation, giving the exact solutions which lie in [0, 2π). tan(x)=cos(x)

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World History Military War

06/20/19

What are some examples of US states warring with one another?

My question is, has there been any states that have warred with each other in the United States? Obviously the one war that comes to mind is the Civil War, not what I am looking for. My question... more

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Linear Equations

06/20/19

If y= -252 when x= 84, what is y when x= 74?

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Algebra 2

06/18/19

Write a system of equations whose solution is (-4, 2)

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Criminal Justice

06/18/19

Must police say the entire Miranda Warning when making an arrest?

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Algebra 1 Algebra

06/17/19

Four times the result of subtracting 1 from a certain number, is equal to three times the number, add 2. Find the answer

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Prealgebra

06/16/19

Average Walking Speed

The speed of a moving walkway is about 3.5 feet per second. Walking on the moving walkway, it takes Kim a total of 20 seconds to travel 35 feet with the movement of the walkway and then back... more

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Statistics

06/16/19

Mean vs. Median: When to Use?

I know the difference between the **mean** and the **median**. - The **mean** of a set of numbers is the sum of all the numbers divided by the cardinality. - The **median** of a set of numbers... more

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Algebra 2 Quadratic Equations And Functions

06/16/19

Solving a word problem

A ball Is thrown from a height of 205' with an initial downwards velocity of 11ft/s the ball's height h in feet after t seconds is given by the following h=205 - 11t -16t^2 how long after the ball... more

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Math Prealgebra Maths

06/16/19

A father tells his son "3 years ago I was 13 times your age, and in 3 years I will be 4 times your age" What is their age now

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Algebra 1 Algebra Polynomials

06/15/19

question about algebra.

Lilly is feeding animals. for every squirrel she feeds them 1 apple, for every deer, she feeds 4 apples, for every rabbit 2 apples, for every bird 3 apples, and for every bear 6 apples. if she... more

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Math Prealgebra

06/15/19

Apply mathematical principles to solve a real-world problem.

An electronics store has a current inventory of 50 stereo systems. The lowest priced stereo system in the store sells for 800 dollars, and the highest priced stereo system sells for $3000 dollars.... more

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Math Algebra 2 Word Problem

06/15/19

Math problem. Algebra II. A veterinarian....

A veterinarian had 140 routine cat or dog appointments for the week. the cost of a routine cat appointment is $20 and of a routine dog appointment is $25. The veterinarian earn $3225 for these... more

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Statistics

06/15/19

How to quantify the differencen between 2/4 and 20/40?

Assume I have two methods to do prediction. The first method makes 4 predictions and 2 out of 4 are correct. The second method makes 40 predictions and 20 out of 40 are correct. The prediction... more

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Math

06/14/19

i need a answer

the point (-6,r) and (6,3) lie on a line with slope 1/2.Find the missing coordinate r. plzzz help

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Math Elementary Math Fractions

06/14/19

Statistics question

Yesterday, 5/8 of the 56 students in a contest gave their speeches. How many students gave their speeches?Write your answer in simplest form. Need help .

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Algebra 2

06/13/19