All Questions

365

Roots of unity question

What is the smallest positive integer such that all the roots of are roots of unity?

Thanks a lot! :)

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Guest Jan 17, 2021

357

help please! :)

Let be a complex number such that and . Compute

Thanks!

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Guest Jan 17, 2021

486

lines

Let P and Q be constants. The graphs of the lines x - 5y = 7 and 15x + Py = Q are perpendicular and intersect at the point (8,3) Enter the ordered pair (P,Q).

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Guest Jan 17, 2021

421

greatest product obtainable

What is the greatest product obtainable from two integers whose sum is 24?

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Guest Jan 17, 2021

411

Please help, thank you!

Assume that each of 2021 people knows exactly one joke and all 2021 jokes are different. These people correspond with each other by email. Every time person A writes person B, A tells every joke he knows. What is the minimum number of emails between pairs read more ..

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Guest Jan 17, 2021

526

percent

The price of an item has been lowered two times, each time by $p$%.
Find $p$, if the final price of the item is $19$% lower than the starting price.

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Guest Jan 17, 2021

565

Help me

If then what is

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Guest Jan 17, 2021

425

help

The real numbers x,y,z satisfy 0<=x<=y<=z<=4. If their squares form an arithmetic progression with common difference 2, determine the minimum possible value of
|x-y|+|y-z|.

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Guest Jan 17, 2021

582

+68

helpppp asap tysm

Ms. Q gave Grogg the following problem: "License plates in Aopslandia consist of six upper-case letters. For example, two possible Aopslandian license plates are $ABCDEF$ and $AAAOPS.$ No two license plates are the same. How many possible Aopslandian license read more ..

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piano123 Jan 17, 2021

509

find xy

Given that $2^{x} = 9$ and $27^{y} = 2$ find the value of $xy$.

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Guest Jan 17, 2021

539

hexagon

ABCDEF is a regular hexagon. Find the ratio of blue area to the yellow area.

AvenJohn ●

Guest Jan 17, 2021

560

Please help I don’t know where to start

When is divided by the remainder is. What is ?

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Guest Jan 17, 2021

404

algebra

When you dry mushrooms,they lose 72% of their wieght. What weight of fresh mushrooms do you need in order to get 122 pounds of dried mushrooms?

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Guest Jan 17, 2021

633

The tail of a 1-mile long train exits a tunnel exactly 3 minutes after the front of the train entered the tunnel. If the train is moving 60

The tail of a 1-mile long train exits a tunnel exactly 3 minutes after the front of the train entered the tunnel. If the train is moving 60 miles per hour, how long is the tunnel?

Why is this wrong???
read more ..

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Guest Jan 17, 2021

369

algebra

The real numbers x,y,z satisfy 0<=x<=y<=z<=y . If their squares form an arithmetic progression with common difference 2, determine the minimum possible value of
|x-y|+|y-z|.

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Guest Jan 17, 2021

808

+49

Help is appreciated!

ABCDEF is a concave hexagon with exactly one interior angle greater than 180 degrees. (The diagram below is not drawn to scale.) Noah measured the marked angles, getting 80,85,95,105,120,125. What interior angle measure of the hexagon, in read more ..

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amphat100 Jan 17, 2021

432

sequence

the sequence 12,15, 18, 21, 51, 81,... consists of all positive multiples of 3 that contain at least one digit that is a 1. what is the 80th term of this sequence?

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Guest Jan 17, 2021

3278

don't know how to do it.

A curve C has equation 𝑦=𝑥^3 −𝑥^2 −𝑥+2
The point P has x-coordinate 2

a) Find dy/dx in terms of x. read more ..

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Guest Jan 17, 2021

594

5x10^-4 X 3.5 X 120 = ?

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Guest Jan 17, 2021

-1

658

+1443

Please HELP! URGENT! Answering this type of problem was not taught in class!

Let and . Find the correct expression for evaluating .

a)
read more ..

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SmartMathMan Jan 17, 2021

507

sequence

The fifth term of an arithmetic sequence is 18, and the sum of the first 32 terms is 1448. Find the ninth term.

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Guest Jan 17, 2021

542

arithmetic mean

The arithmetic mean of 23, 16, 30, 33 and two other numbers that differ by 2 is 27. If the smallest of these 6 numbers is discarded, find the arithmetic mean of the remaining 5 numbers.

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Guest Jan 17, 2021

473

counting

How many positive integers less than 2020 aren’t divisible by 2, 3, 5, or 7?

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Guest Jan 17, 2021

528

help with algebra

Let a and b be the solutions to 5x^2 + 11x + 14 = 0. Find 1/a + 1/b

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Guest Jan 17, 2021

557

sum of all positive integers n

Find the sum of all positive integers $n$ such that 1.2n-4.4<55.2.

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Guest Jan 17, 2021

All Questions ⁺⁰237642 Questions

Roots of unity question

help please! :)

lines

greatest product obtainable

Please help, thank you!

percent

Help me

help

helpppp asap tysm

find xy

hexagon

Please help I don’t know where to start

algebra

The tail of a 1-mile long train exits a tunnel exactly 3 minutes after the front of the train entered the tunnel. If the train is moving 60

algebra

Help is appreciated!

sequence

don't know how to do it.

5x10^-4 X 3.5 X 120 = ?

Please HELP! URGENT! Answering this type of problem was not taught in class!

sequence

arithmetic mean

counting

help with algebra

sum of all positive integers n

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