All Questions

431

Complex Numbers

Let z be a complex number such that z + 1/z = -1. Find z^3.

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Guest May 26, 2021

377

Complex Numbers

Suppose that a and b are positive integers such that (a-bi)^2 = 8 - 6i + 13 - 4i. What is a-bi?

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Guest May 26, 2021

458

Trapezoid

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

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Guest May 26, 2021

413

This is very confusing

Let x, y, and z be nonzero real numbers, such that no two are equal, and

Find all possible numeric values of xyz.

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Guest May 26, 2021

478

Trigonometry

In right triangle DEF, we have angle D = 25 degrees, angle E = 90 degrees, and EF = 19. Find DE to the nearest tenth. You may use a calculator for this problem.

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Guest May 26, 2021

513

glitch/error in web2.0

When you press preview, you will have to press 'I'am not a robot' to ask/answer the question, but I thought I'm was the right spelling....

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Guest May 26, 2021

408

Geometry

A region is bounded by semicircular arcs constructed on the side of a square whose sides measure 2/pi, as shown. What is the perimeter of this region?

read more ..

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Guest May 26, 2021

395

Sequence

A x(1), x(2), x(3), ... sequence is defined by x(n) = x(n - 1) - x(n - 2) for all n >= 2.

If x(10) = 5 and x(14) = 8, then determine x(1).

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Guest May 26, 2021

-1

524

+79

Help!

1. In the coordinate plane, a line passes through the point (12, 3). Its x-intercept is A=(a, 0) where a>0 and its y-intercept is B=(0,b) whre b>0. Find the smallest possible area of triangle OAB, where O is the orgin

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imbadatmath May 26, 2021

464

help pls thx

For how many positive integers n is 9 < √n < 100?

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Guest May 26, 2021

-1

548

+79

Help quickly please!

All the roots of the cubic polynomial f(x)-3x^3+bx^2+cx+d are negative real numbers. If f(0)=81, find the smallest possible value of f(1). Prove that your answer is the minimum

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imbadatmath May 26, 2021

448

PLZ HELP ME AGAIN

1.
Gigi is making a necklace with a bag of 50 beads (10 red, 25 white, 5 yellow, and 8 blue, and 2 green).
Find the probability of the first 5 beads of the necklace to be white, yellow, green, white, and red
(consecutively). read more ..

Guest May 26, 2021

454

Polynomial roots

A polynomial with integer coefficients is of the form
\[9x^4 + a_3 x^3 + a_2 x^2 + a_1 x + 27 = 0.\]
Find the number of different possible rational roots of this polynomial.

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Guest May 26, 2021

490

PLS HELP

Arrange the following numbers in increasing order:
\begin{align*}
A &= \frac{2^{1/2}}{4^{1/6}}\\
B &= \sqrt[12]{128}\vphantom{dfrac{2}{2}}\\
C &= \left( \frac{1}{8^{1/5}} \right)^2\\
D &= \sqrt{\frac{4^{-1}}{2^{-1} \cdot read more ..

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Guest May 26, 2021

575

Find the probability of Taylor rolling a 1 on a number cube and then rolling a 3 on her second roll.

Find the probability of Taylor rolling a 1 on a number cube and then rolling a 3 on her second roll.
Please help us!!!!

I am going to get an F read more ..

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Guest May 26, 2021

603

PLZ HELP

I own a large truck, and my neighbor owns four small trucks that are all identical. My truck can carry a load of at least $600$ pounds more than each of her trucks, but no more than $\frac{1}{3}$ of the total load her four trucks combined can carry. Based read more ..

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Guest May 26, 2021

465

PLS HELP

Find the value of $B - A$ if the graph of $Ax + By = 3$ passes through the point $(-7,2),$ and is parallel to the graph of $x + 3y = -5.$

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Guest May 26, 2021

-1

591

+79

Let f(x) be an even function, and let g(x) be an odd function, such that f(x)+g(x)=x^2+2^x for all real numbers x. Find f(2)

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imbadatmath May 26, 2021

447

Functions

Given that f(x) = x^{2}+2x+5 and g(x) =x+8, what is the value of f(g(5)) -g(f(5))?

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Guest May 26, 2021

449

Base Numbers

How many of the same digits are found in the base 7 and base 8 representations of 62910?

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Guest May 26, 2021

468

help

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Guest May 26, 2021

453

Number Theory

What is the ones digit of 1^2009 + 2^2009 + 3^2009 + ... + 100^2009?

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Guest May 26, 2021

519

help

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Guest May 26, 2021

431

System

Find the ordered triplet (x,y,z) for the following system of equations:
x + 3y + 2z = 1
-3x - y + 5z = 10
-2x - 3y + 2z = 7 read more ..

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Guest May 26, 2021

489

PLZ HELP WITHIN THE HOUR!

Write the equation, in slope-intercept form, of the line passing through the origin and the point $(-4,3)$.

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Guest May 26, 2021

All Questions ⁺⁰238211 Questions

Complex Numbers

Complex Numbers

Trapezoid

This is very confusing

Trigonometry

glitch/error in web2.0

Geometry

Sequence

Help!

help pls thx

Help quickly please!

PLZ HELP ME AGAIN

Polynomial roots

PLS HELP

Find the probability of Taylor rolling a 1 on a number cube and then rolling a 3 on her second roll.

PLZ HELP

PLS HELP

Let f(x) be an even function, and let g(x) be an odd function, such that f(x)+g(x)=x^2+2^x for all real numbers x. Find f(2)

Functions

Base Numbers

help

Number Theory

help

System

PLZ HELP WITHIN THE HOUR!

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