All Questions ⁺⁰237780 Questions

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337

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help math

A class of 30 students recently took a test. If 20 students scored 80, 8 students scored 90, and 2 students scored 94, then what was the class average (the mean) on this test?

Guest Aug 14, 2021

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333

1

Arithmetic sequence

The sum of the first three terms of an arithmetic sequence is 39, and the sum of the last four terms is 178. If the first term is 10, then what is the average of all the terms?

Guest Aug 14, 2021

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446

1

ajuda

(-6)^-3*(-6)^-2

Guest Aug 14, 2021

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450

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Algebra

Find the sum of the first 9 terms of the series $\frac{1^3}{1} + \frac{1^3 + 2^3}{1 + 3} + \frac{1^3 + 2^3 + 3^3}{1 + 3 + 5} + \dots$

Guest Aug 14, 2021

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398

5

help algebra

The sum of three different numbers is 67. The two larger numbers differ by 7 and the two smaller numbers differ by 8. What is the value of the largest number?

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Guest Aug 14, 2021

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291

0

Coordinates

On a Cartesian coordinate plane, points (1,2) and (-7, 4) are opposite vertices of a square. What is the area of the square?

Guest Aug 14, 2021

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449

1

+129

Fractions

In the primary school library, there were 221 more fiction books than non-fiction books. If 3/5
of the non-fiction books and 4/7 of the fiction books were borrowed, the remaining fiction
books will be twice as much as the non-fiction books. Find the read more ..

Soyoxxommm Aug 14, 2021

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452

1

+129

Fractions

In the drink stall, there were 259 more hot drinks than cold drinks. If 4/9 of the hot drinks and 3/7 of the cold drinks were sold, the remaining hot drinks will be twice as much as the cold drinks. Find the number of hot drinks in the stall read more ..

Soyoxxommm Aug 14, 2021

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474

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On Monday Farhan sold 150 buns. On Tuesday he sold 1/4 of the remainder. Then he had 1/3 of the buns left. How many buns did he have at firs

On Monday Farhan sold 150 buns. On Tuesday he sold 1/4 of the remainder. Then he had 1/3 of the buns left. How many buns did he have at first?

Guest Aug 14, 2021

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489

1

Inequality

What is the greatest integer value for m such that 5m-3 > 8m+21 +7m+3?

Guest Aug 14, 2021

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403

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Polynomial

Find the constant coefficient when the polynomial 3(x - 4) + 2(x^2 - x + 7) - 5(x - 1) + 8(x^2 - x + 3) - 4(x - 5) is simplified.

Guest Aug 14, 2021

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275

0

Linear Inequality

Find a linear inequality with the following solution set. Each grid line represents one unit.

Guest Aug 14, 2021

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427

2

Help counting

At my office, 16 people own cats, 11 people own dogs, and 7 people own both cats and dogs. How many people own a cat or a dog?
(Remember that in mathematics, the word "or" is used in the inclusive sense. So if you own both a cat and a dog, then you are read more ..

Guest Aug 14, 2021

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428

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Counting

From ten people, how many ways can you form a team of eight people consisting of a project manager, two (equivalent) deputy project managers, and five (equivalent) engineers?

Guest Aug 14, 2021

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1081

2

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 14, 2021

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421

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+80

Vectors

jleung Aug 14, 2021

0

440

0

+80

Help pls

jleung Aug 14, 2021

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412

0

+80

Help pls

jleung Aug 14, 2021

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313

0

prof is asking for a different way of getting a b c values in partial fraction decomposition.

becomes:
and this is how i arranged it:
and now he wants me to arrange it a simplier way or better way? he gave me a clue and that it starts with 0x^2-1= and that i should figure out the rest. please do help read more ..

Guest Aug 14, 2021

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468

2

help plz

Two triangles are similar. The smaller triangle has a perimeter of 2 units and an area of 2 square units. The perimeter of the larger triangle is 8 square units. What is the area of the larger triangle?

Guest Aug 14, 2021

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469

1

Expected value

In a game that costs 3 dollars to play, a fair die is rolled. If a five or a six is rolled the player receives 6 dollars. If any other number is rolled, the player receives 1 dollar. What is the expected value of the game?

Guest Aug 14, 2021

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344

1

help sequences

The number of terms in an arithmetic progression is even. The sum of odd-numbered terms in it is 24 and the sum of the even-numbered terms is 30. If the last term exceeds the first term by 21/2, then find the number of terms in the arithmetic read more ..

Guest Aug 14, 2021

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486

1

please help

Let $p(x)$ be a polynomial of the form p(x)=2x^3+ax^2+38x+c such that $4$ and $6$ are roots of $p(x)$. What is the third root?

Guest Aug 14, 2021

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