All Questions

545

please help!

A band is marching in a rectangular formation with dimensions n-2 and n+18. In the second stage of their performance, they re-arrange to form a different rectangle with dimensions n and 2n-4 , excluding all the drummers. If there are read more ..

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Guest Dec 21, 2020

449

arithmetic sequence

Let a_1, a_2, a_3, ... be an arithmetic sequence. If a_5/a_3 = 3, then find a_4/a_2.

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Guest Dec 21, 2020

567

+216

Help

How many positive perfect cube factors does have?

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Jmaster10 Dec 21, 2020

477

Anybody wanna help, thanks in advance

Let $a,$ $b,$ $c,$ $d,$ and $e$ be the distinct roots of the equation $x^5 + 7x^4 - 2 = 0.$ Find \begin{align*} &\frac{a^4}{(a - b)(a - c)(a - d)(a - e)} + \frac{b^4}{(b - a)(b - c)(b - d)(b - e)} \\ &\quad + \frac{c^4}{(c - a)(c - b)(c - d)(c - read more ..

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Guest Dec 21, 2020

Dec 20, 2020

1238

+466

Find the product of all positive integer values of $c$ such that $8x^2+15x+c=0$ has two real roots.

help please

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dududsu2 Dec 20, 2020

443

sequence

A sequence with a_1 = 1 is defined by the recurrence relation a_n = 2a_{n - 1} for all natural numbers n. If a_{23} = 2^p, then what is p?

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Guest Dec 20, 2020

531

Arctan(a/b)

If Pi/4 = 8Arctan(1/10) - Arctan(a/b), what is the fraction a/b? Thanks for help.

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Guest Dec 20, 2020

426

Need help with this

A cell phone company offers a plan that costs 35 dollars per month plus an additional cost of $0.08 per text message.
Write an equation to represent this problem.
Include with your equation, what each variable represents. read more ..

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Guest Dec 20, 2020

499

HELP!

A ''super ball'' is dropped from a window 16 meters above the ground. On each bounce it rises 3/4 the distance of the preceding high point. The ball is caught when it reached the high point after hitting the ground for the third time. To the nearest meter, read more ..

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Guest Dec 20, 2020

488

hard sum

If only the positive integers from 1 through 49, inclusive, are written on a piece of paper, what is the sum of all the numbers that are written on the paper?

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Guest Dec 20, 2020

944

Help needed thanks whoever helps me!

Beth rolls a fair six-sided die. If she rolls a prime number, she wins 1 dollar, but if she rolls a composite number, she loses 1 dollar. If she rolls 1 nothing happens. What is the expected value of the amount of money Beth will win if she rolls the die read more ..

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Guest Dec 20, 2020

387

Help!!

Alex is selling t-shirts for a school fundraiser, it will cost him $300 to start but will earn $7.50 for each t-shirt he sells.
Let P represent the profit and let n represent the number of t-shirts.
Write the equation read more ..

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Guest Dec 20, 2020

695

Please, this topic makes no sense...

If \[x^2 - 7x + c = (x + a)^2\]for some constants $a$ and $c,$ then find $a.$

If \[x^2 - 7x + c = (x + a)^2\]for some constants $a$ and $c,$ then find $c.$
read more ..

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Guest Dec 20, 2020

423

geometry

In trapezoid ABCD, sides AB and CD are parallel, angle A = 2(angle D), and angle C = 8(angle B). Find angle B

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Guest Dec 20, 2020

468

Im confused

Find all complex numbers $z$ such that $z^4 = -4.$
Note: All solutions should be expressed in the form $a+bi$ , where $a$ and $b$ are real numbers.
I'm not exactly sure how to start or solve this. Can I have a hint? read more ..

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Guest Dec 20, 2020

676

+541

Absolute Value

If a is less than b, what is the value of |a-b|+a+b?

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xXxTenTacion Dec 20, 2020

416

minimum value

What is the minimum value of the expression 2x^2 + 3y^2 + 8x - 10y + 62 for real x and y?

Guest Dec 20, 2020

427

Help would be greatly appreciated

Bob rolls a fair six-sided die each morning. If Bob rolls a composite number, he eats sweetened cereal. If he rolls a prime number, he eats unsweetened cereal. If he rolls a 1, then he rolls again. In a non-leap year, what is the expected number of times read more ..

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Guest Dec 20, 2020

508

lines

The graphs of 2y + x + 3 = 0 and 8y + ax + 2 = 0 are perpendicular. Solve for a.

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Guest Dec 20, 2020

459

help really quickly! I honestly don't get the question.

Let f(n) return the number of distinct ordered pairs of positive integers (a,b) such that for each ordered pair, a^2+b^2=n. Note that when a≠b, (a,b) and (b,a) are distinct. What is the smallest positive integer n for which f(n)=3?
read more ..

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Guest Dec 20, 2020

440

help

1.How many complex numbers z are there in the first quadrant such that |z| and z^3 is real?

Guest Dec 20, 2020

533

integers

Given positive integers x and y such that x is not equal to y and 1/x + 1/y = 1/20, what is the smallest possible value for x + y ?

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Guest Dec 20, 2020

498

Five 6-sided dice are rolled. What is the probability that exactly one of the dice shows 1?

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Guest Dec 20, 2020

808

help please

The expression is equal to -10 However, we can obtain values different than -10 by inserting a single set of parentheses. For example, we can insert parentheses around 23-4 and get:
Find how many values can be obtained in total read more ..

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Guest Dec 20, 2020

425

2*2/5.5

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Guest Dec 20, 2020

All Questions ⁺⁰237749 Questions

please help!

arithmetic sequence

Help

Anybody wanna help, thanks in advance

Find the product of all positive integer values of $c$ such that $8x^2+15x+c=0$ has two real roots.

sequence

Arctan(a/b)

Need help with this

HELP!

hard sum

Help needed thanks whoever helps me!

Help!!

Please, this topic makes no sense...

geometry

Im confused

Absolute Value

minimum value

Help would be greatly appreciated

lines

help really quickly! I honestly don't get the question.

help

integers

Five 6-sided dice are rolled. What is the probability that exactly one of the dice shows 1?

help please

2*2/5.5

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