All Questions ⁺⁰237720 Questions

0

422

1

+19

HELP PLS

Let and , for some constants and . If and for , find the sum of all possible values of .

uttoki Aug 16, 2021

0

432

1

+80

Help pls

jleung Aug 16, 2021

0

385

1

help counting

Ms. Rathman has 5 nickels, 3 dimes, and 2 quarter. In how many ways can she make change for 50¢?

Guest Aug 16, 2021

0

404

1

HELP PLS URGENT

Find the domain of this function

Guest Aug 16, 2021

0

313

1

HELP PLS URGENT

Find the domain of the function

Guest Aug 16, 2021

0

436

1

+19

PLS HELP

If , find the value of

uttoki Aug 16, 2021

0

468

2

+80

Help

Matt, Justin, Tony and Gabriel shared $168. Gabriel received 1/7 of the amount of money received by Matt, Tony and Justin. Matt received 3/4 of the amount of money received by Tony and Justin. Justin received 2/5 as much money as Tony. How much did Justin read more ..

DoctorOcopisMonOct Aug 16, 2021

0

512

2

+58

Please help, thanks!

Marcus and Kevin had the same number of stamps at first. Marcus gave 1/4 of his stamps away and Kevin gave 1/3 of his stamps away. In the end, Kevin had 15 stamps fewer than Marcus. How many stamps did Marcus give away?

swagmastercaillou Aug 16, 2021

0

318

1

help counting

Farmer Ben has only ducks and cows 24 in total. He can’t remember how many of each hehas. He knows that the animals have a total of 66 legs. Assuming that each animal has all legs intact and no extra limbs, how many of each animal does farmer Ben have? read more ..

Guest Aug 16, 2021

0

249

0

help Algebra

Given that 1/x + 1/y = 1/3 and xy + x + y = 4, compute x^2*y + x*y^2.

Guest Aug 16, 2021

0

284

0

Proportion

The values of x and y are always positive, and x^2 and y^2 vary inversely. If y is 10 when x is 12, then find x when y is 4000.

Guest Aug 16, 2021

0

263

0

Geometry

Let A, B, C be points on circle O such that AB is a diameter, and CO is perpendicular to AB. Let P be a point on OA, and let line CP intersect the circle again at Q. If OP = 20 and PQ = 8, find r^2, where r is the radius of the read more ..

Guest Aug 16, 2021

0

427

1

Geometry

Circle O is tangent to AB at A, and angle ABD = 90 degrees. If AB = 12 and CD = 16, find the radius of the circle.

read more ..

Guest Aug 16, 2021

0

350

1

Inequality

Let a_1, a_2, ..., a_n be real numbers such that a_1^2 + 2a_2^2 + ... + na_n^2 = 1. Find the maximum value of (a_1 + 2a_2 + ... + na_n)^2.

Guest Aug 16, 2021

0

328

1

Inequality

Let a_1, a_2, ..., a_{20} be real numbers such that
a_1 + 2a_2 + ... + 20a_{20} = 1,
and a_1^2 + 2a_^2 + ... + 20a_{20}^2 is minimized. Find a_{12}.

Guest Aug 16, 2021

0

449

2

+56

Fractions

In the class library, 3/5 of the books are fiction books. 2/3 of the remaining books are non-fiction books. The rest are magazines. There are 10 fewer magazines than non-fiction books in the class library. How many fiction books are there altogether? read more ..

IMTHEBEAST Aug 16, 2021

0

438

1

+56

Fractions

Vernon has 2/5 as many stamps as Walsh at first. They then sold the same number of stamps each. Vernon now has 57 stamps which is one-third the number of stamps Walsh have. Find the number of stamps each of them had at first.

IMTHEBEAST Aug 16, 2021

0

378

1

+56

Fraction (Remainder Concept (Branching))

Benjamin had a sum of money. He spent $288 on a watch and of the remainder on a belt. He had of his money left in the end.
(a) What fraction of the money did he spend on the watch?
(b) How much money did he have at first?

IMTHEBEAST Aug 16, 2021

0

335

1

Inequality

Let a_1, a_2, ..., a_n be real numbers such that a_1 + 2a_2 + ... + na_n = 1. Find the minimum value of a_1^2 + 2a_2^2 + ... + na_n^2.

Guest Aug 16, 2021

0

370

1

Inequality

If w, x, y, and z are positive real numbers such that w + 2x + 3y + 4z = 8, then what is the maximum value of wxyz?

Guest Aug 16, 2021

0

460

1

+120

Maths

Iskander, Anthony and Sean have a total of 555 stamps. Anthony has 13 more stamps than Iskander. Sean has twice the total number of stamps as Anthony and Iskander have. How many stamps does Anthony have?

florianmanteyw Aug 16, 2021

0

461

4

+120

maths

In the morning, the ratio of the chicken eggs to the quail eggs at the market was 3 : 2. By the evening, 210 chicken eggs were sold, the ratio of the number of chicken eggs to the quail eggs became 1 : 3. How many eggs were at the market in the end? read more ..

florianmanteyw Aug 16, 2021

0

472

1

+120

Teachers, can explain how to do this? Thanks.

Kelvin and Patrick had some money in the ratio 3:5. The ratio of Kelvin's expenditure was 3:4. If Kelvin spent 1/3 of his money and Patrick had $55 left, how much money did Kelvin have at first?

florianmanteyw Aug 16, 2021

0

259

0

help with triangle

Two of the altitudes of an acute triangle divide the sides into segments of lengths 5,3,1 and x units, as shown. What is the value of x?

Guest Aug 16, 2021

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