All Questions

643

number of regions

What is the number of maximum regions in which 7 lines divide a plane into?

●

Guest Jan 30, 2021

413

probability question

In a regular polygon of 1414 sides, three vertices are chosen at random. What is the probability that a triangle formed using these vertices is a right-angled triangle?

●●

Guest Jan 30, 2021

556

+61

find the equation.

f(x) = x ^ (3/2) Find an equation for the line tangent to the graph of f^ prime at the point (4, f^ prime (4))

●

Yaj143 Jan 30, 2021

319

dice probability

An ordinary cube has four blank faces, one face marked 2 and another marked 3. Then the find probability of obtaining 9 in 5 throws to 3 significant figures.

Guest Jan 30, 2021

714

+70

help pls

Consider a Hot Jupiter with a temperature of 2990 K orbiting the star Vega. At what wavelength (in nanometers) would the Hot Jupiter would be brightest?
unanswered

●

Skatergoat Jan 30, 2021

666

+61

Calculate the average rate of change

Calculate the average rate of change of the function over the given interval f(x) = 2x + 3 [1, 5] )

●

Yaj143 Jan 30, 2021

336

absolute value

\[\large x^2 + |x| - 2 = 0 \]
Find the value(s) of $x$ satisfying the above equation.

Guest Jan 30, 2021

624

+328

The following are all 24 numbers made of digits 1, 2, 3, 4 exactly once:

The following are all 24 numbers made of digits 1, 2, 3, 4 exactly once:
1234,1243,1324,1342,1423,1432,2134,2143,2314,2341,2413
,2431,3124,3142,3214,3241,3412,3421,4123,41324213,4231,4312,4321
What is the average of these 24 numbers? read more ..

●

Potatobird Jan 30, 2021

471

+61

Graph of equation

the graph of an equation is a vertical line, what can be said about the derivative?

●●

Yaj143 Jan 30, 2021

398

c and p

A total of 30 students signed up for the English or Math classes. Fifteen students are taking English and Math. Eight students are taking English but not Math. How many students are taking math?

●

Guest Jan 30, 2021

427

trapezoid

Let ABCD be a trapezoid with bases BC and AD. In this trapezoid, angle DBA = 105, angle ABD = 43, and angle BCD = 147. Find angle CBD, in degrees.

●●

Guest Jan 30, 2021

548

+138

the FINAL IB Practice question im not entirely sure how to do. I'm not sure how to work backwards with normal distributions.

no clue

●●●

SpaceTsunaml Jan 30, 2021

496

Find the value of x

Find the value of x satisfying the equation \[ \sqrt{ 3\sqrt{x+5} - \sqrt{x-2} } = 3. \]

●

Guest Jan 30, 2021

392

help please

A box has a total surface area of 100. The length of the box is equal to twice its width, as well as equal to 8 less than its height. What is the height of the box?

●

Guest Jan 30, 2021

570

+138

One last IB problem my brain stopped working on and desperately need help

So I missed learning this kinda problem ahh yeah

●●●●●●●●●●

SpaceTsunaml Jan 30, 2021

529

integers

\[ \large{\begin{cases} x^2+y^2+z^2=18 \\ xy+yz+zx = 9 \end{cases}} \]
Let $x,y$ and $z$ be integers satisfying the system of equations above. Find $ |x| + |y| + |z| $.

●

Guest Jan 30, 2021

376

percent

I found my favorite brand of jeans on sale for 20% off at a store. If the jeans are normally $90 and the tax is 7.5%, how much will I pay for 2 pairs of jeans? (No dollar sign in answer please)

●

Guest Jan 30, 2021

-1

490

+193

Please Help Me

The quadratic $x^2+\frac{3}{2}x-1$ has the following unexpected property: the roots, which are $\frac{1}{2}$ and $-2$, are one less than the final two coefficients. Now find a quadratic with leading term $x^2$ such read more ..

●

clairepow Jan 30, 2021

579

+138

Another lovely IB problem I dont understand lol

So yeah this is it, idk where to start

●●●●●●●●●●●●●●

SpaceTsunaml Jan 30, 2021

487

trapezoid

The area of the trapezoid ABCD is equal to 60. The length of one of of the bases is 9 units greater than the other base, and the height of trapezoid ABCD is equal to 8. What is the legth of the median of trapezoid ABCD

●

Guest Jan 30, 2021

Jan 29, 2021

363

help with geometry

In the above figure, $\triangle{ABC}$ is a right-angled triangle in which $AC$ is the hypotenuse. $\angle{BAC} = {30}^{\circ}$. $D$ is the midpoint of $AC$. Then find the value of $\angle{BDC}$.

read more ..

●

Guest Jan 29, 2021

518

+87

Help Please ASAP!

If ABCDEF is a regular hexagon, what smallest positive rotation about E maps C to A?

●

JoLink Jan 29, 2021

365

Number Theory

If you are a merchant selling goods by weight, what is the minimum number of weights, in kg, that you would need to make up every number from 1 kg to 100 kg? [The case of 1 kg weight repeated 100 times is trivial!]. thanks for help.

●

Guest Jan 29, 2021

487

+328

The equilateral triangle

An equilateral triangle is made of a large number of “unit” equilateral triangles of sides 1 centimeter each. The area of the big equilateral triangle is N times as big as the area of the unit equilateral triangle. What is N? (P.S. The Equilateral triangle read more ..

●

Potatobird Jan 29, 2021

394

what is the sequence?

\[ \dfrac 34+\dfrac3{28}+\dfrac3{70}+\dfrac3{130}+\cdots +\dfrac3{9700}= \, ? \]

●

Guest Jan 29, 2021

All Questions ⁺⁰237643 Questions

number of regions

probability question

find the equation.

dice probability

help pls

Calculate the average rate of change

absolute value

The following are all 24 numbers made of digits 1, 2, 3, 4 exactly once:

Graph of equation

c and p

trapezoid

the FINAL IB Practice question im not entirely sure how to do. I'm not sure how to work backwards with normal distributions.

Find the value of x

help please

One last IB problem my brain stopped working on and desperately need help

integers

percent

Please Help Me

Another lovely IB problem I dont understand lol

trapezoid

help with geometry

Help Please ASAP!

Number Theory

The equilateral triangle

what is the sequence?

1 Online Users

Top Users

Sticky Topics