All Questions

402

number theory

What is the residue modulo 16 of the sum of the modulo 16 inverses of the first 4 positive odd integers? Express your answer as an integer from 0 to 15, inclusive.

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Guest Dec 10, 2020

586

perpendicular chords

Perpendicular cords AC and DE intersect at B so that the lengths of AB,BC and BD are 3, 4 and 2 respectively. Find the radius of the circle.

read more ..

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Guest Dec 10, 2020

859

Final question of the day! ( for me)

The polynomial $f(x) = 5x^3 - x^2 - 30x + 6$ has exactly one rational root. What is it?

I got 1/5

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Guest Dec 10, 2020

-1

618

Try to write the biggest number you can write using at most 6 characters! Characters include numbers, letters, operations, etc.

Parentheses don't count toward character count, and exponents count as 2 characters.
My current answer might be
(9⁹⁹)!

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Guest Dec 10, 2020

-1

518

looking at this problem

A right triangle has its legs parallel to the x and y axes as shown in the figure. If the hypotenuse has a slope of -4/3, and the diameter of the bigger circle is 2020, what is the diameter of the smaller circle?
read more ..

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Guest Dec 10, 2020

-1

1480

Anybody Help?

The polynomial$$f(x) = x^3+10x^2+27x+10$$has one integer root. What is it?

my go at it, I use the integer root theorem thing and get that p/q as q=+-1, and p=+-1, +-2, +-5, +-10, now I find all possible values so
p/q=+-1, read more ..

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Guest Dec 10, 2020

-2

556

right triangle

In right triangle ABC, angle B = 90. M is the midpoint of AC, and BM = sqrt(117). The sum of AB and BC is 30. Find the area of triangle ABC.

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Guest Dec 10, 2020

-1

496

help hurry

b) Suppose Jenny divides the square root of her favorite positive integer by $\sqrt2$. Does she have to get an integer? (Remember, when Jenny multiplies the square root of her favorite integer by $\sqrt2$, she gets an integer.)

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Guest Dec 10, 2020

-1

598

Algebra problem

Find the 8th term of the geometric sequence 7, -21, 63,

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Guest Dec 10, 2020

-1

398

inverses

The inverse of a modulo 39 is b. What is the inverse of 14a modulo 39 in terms of b? Give your answer as an expression in terms of b.

Guest Dec 10, 2020

-1

468

Help needed quick!

Two cards are chosen at random from a standard 52-card deck. What is the probability that the first card is a heart and the second card is a 10?

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Guest Dec 10, 2020

-1

392

counting prob

If the permutations of the first 5 letters, a, b, c, d, e, are arranged in alphabetical order from the beginning to the end, then what is the alphabetical order of the 67th term?

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Guest Dec 10, 2020

622

+40

Easy question please help fast

Kirk and Montega have accepted a job mowing the soccer playing fields. They must mow an area 500 feet long and 400 feet wide. They agree that each will read more ..

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Mathulator Dec 10, 2020

-1

1304

In the harmonic sequence 1/3,1/8,1/13, … which term is 1/123?

In the harmonic sequence 13,18,113, … which term is 1123?

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Guest Dec 10, 2020

-1

410

probability q

Two distinct integers, x and y, are randomly chosen from the set {1,2,3,4,5,6,7,8,9,10}. What is the probability that xy is even?

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Guest Dec 10, 2020

-1

510

Please help ASAP!

If x and y are integers and 0 is ≤ x < y ≤ 3, what is the sum of all possible values x^y?

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Guest Dec 10, 2020

449

Three cards are chosen at random from a standard 52-card deck

Three cards are chosen at random from a standard 52-card deck. What is the probability that they all have different suits?

Guest Dec 10, 2020

806

13. Jeremy can row 5/8 of a mile in 1/4 of an hour. What is the unit rate that describes the miles per hour? *

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Guest Dec 10, 2020

Dec 9, 2020

385

graphing question

Assume that f(3) = 4. Name a point that must be on the graph of y = 2f(x/2 + 2).

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Guest Dec 9, 2020

433

help

A man invests his savings in two accounts, one paying 6 percent and the other paying 10 percent simple interest per year. He puts twice as much in the lower-yielding account because it is less risky. His annual interest is 286 dollars. How much did read more ..

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Guest Dec 9, 2020

396

Tough Probability

A fair 6-sided die is rolled 30 times. What is the expected number of times that number 1 will come up? What is the probability that number 1 will come up its expected number of times? Thank you.

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Guest Dec 9, 2020

877

Help Please!!!

Find the value kk that makes the function continuous.

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SpongeBob4LIFE24 Dec 9, 2020

909

helppppp

If I roll 5 standard 6-sided dice and multiply the number on the face of each die, what is the probability that the result is a composite number?

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Guest Dec 9, 2020

All Questions ⁺⁰237637 Questions

number theory

perpendicular chords

Final question of the day! ( for me)

Try to write the biggest number you can write using at most 6 characters! Characters include numbers, letters, operations, etc.

looking at this problem

Anybody Help?

right triangle

help hurry

Algebra problem

inverses

Help needed quick!

counting prob

Easy question please help fast

In the harmonic sequence 1/3,1/8,1/13, … which term is 1/123?

probability q

Please help ASAP!

Three cards are chosen at random from a standard 52-card deck

13. Jeremy can row 5/8 of a mile in 1/4 of an hour. What is the unit rate that describes the miles per hour? *

graphing question

help

Tough Probability

Help Please!!!

helppppp

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