All Questions

989

Plane-Wind-Vector problem

If a plane flies from south to north with 324 km/h and the wind blows from northeast to southwest with 28.3 m/s what is the angle between the fly direction and the deviating direction if the pilot ignores the wind? Sorry if my english wasn't able to explain read more ..

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Guest Sep 24, 2017

1306

powers of 0

0 to the power of 0

hectictar ●●●●●●●

Guest Sep 24, 2017

924

How can you factorise a quadratic equation with values larger than squared

(example is 28n^4+16n^3-80n^2)

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Guest Sep 24, 2017

796

Equation

When's doing an equation how can I change the subject of the equation because the final answer on the calculator doesn't get vex me the right subject. The equation was a/(sqrt 1-x^2) = b/c. Make x the subject of this equation

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Guest Sep 24, 2017

792

4^(7)×4^(3)÷4^(6)

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Guest Sep 24, 2017

939

(1+x^2)i/(1+xi)+(x-6i)

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Guest Sep 24, 2017

+31

14086

+118724

PUZZLES

I think it is time for us to have a new puzzle thread

THIS THREAD WILL BE AVAILABLE IN THE STICKY TOPICS
read more ..

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Melody Sep 24, 2017

971

How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?

Alan ●●

Guest Sep 24, 2017

812

multiplying this radical expression?

square root of 11(3 - 4 square root of 7)

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Guest Sep 24, 2017

1220

statistics

25,55,40,65,29,45,59,35,25,37,52,30,8,40,55 find the standard deviation and mean

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Guest Sep 24, 2017

Sep 23, 2017

865

factoring help please

x^6+2x^3+1 fully factored?

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Guest Sep 23, 2017

1540

Algebra

Compute the sum $$\frac{2}{1 \cdot 2 \cdot 3} + \frac{2}{2 \cdot 3 \cdot 4} + \frac{2}{3 \cdot 4 \cdot 5} + \cdots$$

heureka ●●●●●●●

Guest Sep 23, 2017

2506

Algebra

Let $$f(x) = \frac{x^2}{x^2 - 1}.$$Find the largest integer $n$ so that $f(2) \cdot f(3) \cdot f(4) \cdots f(n-1) \cdot f(n) < 1.98.$

read more ..

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Guest Sep 23, 2017

+29

6918

+130518

How Much Do They Weigh ????

This is another problem from American puzzle-maker Sam Lloyd.....

Five little girls taken in couples weigh 129 pounds, 125 pounds, 124 pounds, 123 pounds, 122 pounds, 121 pounds, 120 pound, 118 pounds, 116 read more ..

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CPhill Sep 23, 2017

753

Please help

2 1/4 + 3 1/2 x 1/3

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Guest Sep 23, 2017

1092

Let $f$ be defined by \[f(x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\

Let $f$ be defined by \[f(x) = \left\{ \begin{array}{cl} 3-x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\]Calculate $f^{-1}(0)+f^{-1}(6)$.

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Guest Sep 23, 2017

808

Integers Question

On a number line, let poin P represent the largest integer value that is greater than √201. Let point Q represent the largest integer value that is less than -√20. What is the distance between P and Q?

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Guest Sep 23, 2017

557

Probability

How do you solve probability? I just don't understand it.

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Guest Sep 23, 2017

854

Quick Help on Algebra

Adam and Barb had a book sale over the weekend. Adam sold 4 hardcover books and ten paperbacks. Barb sold 5 hardcover books and 7 paperbacks for the same prices each. Adam sold $62 worth of books while Barb sold $61 worth. How much did they charge for hardcovers read more ..

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Guest Sep 23, 2017

2293

Calculating the sum of integers between 2 square roots question

What is the sum of all of the integers between the square root of 25 and the square root of 140 ?

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Guest Sep 23, 2017

693

Plot the inequality on the number line.

Plot the inequality on the number line.
x≤1 or x>8

Choose the correct endpoints. read more ..

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Guest Sep 23, 2017

868

root

square root 52

TheXSquaredFactor ●●

Guest Sep 23, 2017

1113

How would you solve this?

sqrt(33+sqrt(8))sqrt(6+sqrt(3+sqrt(8)))sqrt(3+sqrt(3+sqrt(3+sqrt(8))))sqrt(3-sqrt(3+sqrt(3+sqrt(8))))

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Guest Sep 23, 2017

930

what is a irrarational number

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Guest Sep 23, 2017

All Questions ⁺⁰237643 Questions

Plane-Wind-Vector problem

powers of 0

How can you factorise a quadratic equation with values larger than squared

Equation

4^(7)×4^(3)÷4^(6)

(1+x^2)i/(1+xi)+(x-6i)

PUZZLES

How do you answer cube root 1/27 = 3-y (the negative y is a power on 3)?

multiplying this radical expression?

statistics

factoring help please

Algebra

Algebra

How Much Do They Weigh ????

Please help

Let $f$ be defined by \[f(x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\

Integers Question

Probability

Quick Help on Algebra

Calculating the sum of integers between 2 square roots question

Plot the inequality on the number line.

root

How would you solve this?

what is a irrarational number

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