All Questions ⁺⁰236164 Questions

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171

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urgent help plz

Determine an equation of the function f(x) in terms of g(x) and g(x) in terms of f(x).

Guest Feb 16, 2022

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321

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+1632

quick question!

How many possible non-congruent pentagram shapes (reflected and rotated are the same) can you make on a 5 x 5 grid?

A pentagram consists of 5 unit squares. Ex: 5 x 1 is a kind of pentagram (a rectangle), it could also be a stair pattern, read more ..

proyaop Feb 16, 2022

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322

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trapezoid

What is the area of the trapezoid shown? Express your answer in the simplest exact form.

read more ..

Guest Feb 16, 2022

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309

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coordinates

The area of rectangle ABCD with vertices A(0, 0), B(0, 4), C(x, 4) and D(x, 0) is 32 square units. If x > 0, what is the value of x?

Guest Feb 16, 2022

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330

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Divisors

We choose a positive divisor of 20^20 at random (with all divisors equally likely to be chosen). What is the probability that we chose a multiple of 10^18?

Guest Feb 16, 2022

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294

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help with domain

Let f(x) = (3x^2 - 10x - 25)/(x - 3) and g(x) = (3x^2 - 10x - 25)/(3x^2 + 11x + 7). Find the sum of all real numbers that are not in the domain of f(g(x)).

Guest Feb 16, 2022

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381

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Plz help need answer

Ella purchased a game that was on sale for 12% off. The sales tax in her county is 6%. Let y represent the original price of the game. Write an expression that can be used to determine the final cost of the game.

Guest Feb 16, 2022

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171

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Algebra

Enter (A,B,C) in order below if A, B, and C are the coefficients of the partial fractions expansion of (2x^2 + 3x - 15)/(x(x^2 - 1)) = A/x + B/(x - 1) + C/(x + 1).

Guest Feb 16, 2022

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326

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help plz

What is the coefficient of x^3 in the expansion of (x+2*sqrt3*7)^3?

Guest Feb 16, 2022

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254

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Please help. :)

Alice and Bob each have a certain amount of money. If Alice receives n dollars from Bob, then she will have 4 times as much money as Bob. If, on the other hand, she gives n dollars to Bob, then she will have 3 times as much money as read more ..

Guest Feb 16, 2022

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298

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Complex Numbers

Express (4 - 5i)(5 + 5i) in the form a + bi where a and b are integers and i^2 = -1.

Guest Feb 16, 2022

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292

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Proving Cramer's rule

How do I prove Cramer's Rule?

[Example of Cramer's] read more ..

Guest Feb 16, 2022

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315

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Quadratic roots

Each solution to x^2 + 5x + 18 = 0 can be written in the form a + bi where a and b are real numbers. What is a^2 + b^2?

Guest Feb 16, 2022

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331

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Let a=(4,2) b=(3,9) and c=(x,7) find x such that abc has a right angle at b

Let a=(4,2) b=(3,9) and c=(x,7) find x such that abc has a right angle at b

Guest Feb 16, 2022

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187

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find a positive value k stuff that ||v-kw||=5

find a positive value k stuff that ||v-kw||=5

Guest Feb 16, 2022

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318

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A small and easy problem

Find all values (a, b, c, d) that satisfy ac = 6, ad = 4, bc = 9, and bd = 6.

I already found (a, b, c, d) = (2, 3, 3, 2,), just wanted to know some other sets

Guest Feb 16, 2022

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305

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Complex Numbers

If Q = 11 - 5i, E = 3 - 2i, and D = 2i, find QED.

Guest Feb 16, 2022

Feb 15, 2022

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263

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Counting

How many ordered pairs of positive integers (m,n) satisfy lcm[m,n]=?

Guest Feb 15, 2022

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310

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_+-5=4

Guest Feb 15, 2022

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325

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Algebra

There are two pairs (x,y) of real numbers that satisfy the equation x + y = 3, xy = 1. Given that the solutions x are in the form x = (a pm b*sqrt(c))/d where a, b, c, and d are positive integers and the expression is completely simplified, what read more ..

Guest Feb 15, 2022

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_ - 5 = -9

Guest Feb 15, 2022

+1

332

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help

If and , find the value of

Guest Feb 15, 2022

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331

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Can anyone help?

I have no idea what to do here.

Solve the following system of equations for :

Guest Feb 15, 2022

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need help!

I really need help solving this system:

Guest Feb 15, 2022

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i am so lost :(

hi there
i just started an algebra class and my teacher gave us this problem to do for homework and I need some help on working though it:

Find all solutions to the system \begin{align*} a + b &= 14, \\ a^3 + b^3 &= read more ..

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Guest Feb 15, 2022

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