All Questions ⁺⁰237771 Questions

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413

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system

Find the ordered pair (s, t) that satisfies the system
s/2 - 3t= -1
3t + 2s= 3

Guest Aug 3, 2021

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298

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help algebra

Find all pairs (x,y) of real numbers such that x + y = 10 and x^2 + y^2 = 56 + 2xy.

Guest Aug 3, 2021

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342

1

help help HELP

Guest Aug 3, 2021

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442

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help counting

1. How many ways can you distribute 4 different balls among 4 different boxes, if at least one box must be empty?

2. How many ways can you distribute 4 identical balls among 4 identical boxes, if at least one box must be empty? read more ..

Guest Aug 3, 2021

0

518

1

HELP!!!!!

If a girl 5 feet tall could walk around the equator, how many feet further would the top of her head travel than her feet? Assume that the earth is a sphere. Express your answer in terms of pi.

Thanks!

Guest Aug 3, 2021

0

381

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polygon

A square tile, a regular hexagon tile, an equilateral triangle tile, and a regular n-sided polygon tile share a common vertex. There are no gaps or overlaps between the tiles. What is n?

Guest Aug 3, 2021

-1

492

3

Let be nonnegative real numbers.

Let be nonnegative real numbers.

(a) Prove that
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Guest Aug 3, 2021

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319

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geometry

In the diagram below AM = BM = CM, and angle BMC + A = 210 degrees. Find angle B in degrees.

Guest Aug 3, 2021

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336

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geometry

In the diagram, BDF and ECF have the same area. If DB = 2, BA = 3, and AE = 5, find the length of EC.

read more ..

Guest Aug 3, 2021

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303

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Counting

We call a number peachy if every digit in the number is either a $3$ or next to a $3.$ For example, the numbers $333,$ $83,$ $303,$ and $3773$ are all peachy, but the numbers $32523,$ $786,$ $340,$ and $3999$ are not peachy.

How read more ..

Guest Aug 3, 2021

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397

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Algebra

What percent of water must be evaporated from a 4% salt solution so that it becomes 6% salt solution? Round your answer to the nearest hundredth.

Guest Aug 3, 2021

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316

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help

Ivan has a 20" x 20" x 20" gift box that needs to be placed carefully into a 2' x 2' x 2' shipping carton, surrounded by packing peanuts. Ivan uses 1 cubic foot bags of peanuts. He opens one bag and spreads them evenly on the bottom of the shipping carton. read more ..

Guest Aug 3, 2021

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346

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Algebra

A farming field can be ploughed by 6 tractors in 4 days. When 6 tractors work together, each of them ploughs 120 hectares a day. If two of the tractors were moved to another field, then the remaining 4 tractors could plough the same field in 5 days. How read more ..

Guest Aug 3, 2021

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382

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help geometry

Riders on a Ferris wheel travel in a circle in a vertical plane. A particular wheel has radius 20 feet and revolves at the constant rate of one revolution per minute. How many seconds does it take a rider to travel from the bottom of the wheel read more ..

Guest Aug 3, 2021

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343

1

Algebra

What number must be placed in the box below so that the resulting quadratic is the square of a binomial

9x^2 + 8x + _____

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470

1

Compute: . Express your answer as a common fraction. Halp

Compute: . Express your answer as a common fraction. Halp

Guest Aug 3, 2021

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511

3

Percent

In a chess club, 75% of the members are boys. Of these boys, 8% have hazel eyes. If 6 boys have hazel eyes, how many people are in the chess club

Guest Aug 3, 2021

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407

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Coordinates

Determine an expression for the area of triangle QCA in terms of p. Your answer should be simplified as much as possible.

Guest Aug 3, 2021

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327

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Coordinates

(1,7), (13,-16) and (5,k) are the vertices of a triangle. What is the sum of all possible values of "k" for which the area of the triangle is minimum? (k can only be an integer)

Guest Aug 3, 2021

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331

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Trigonometry help please

Hi, how to find the general solution(s) of the following equation:
(in radians).
and:
Show that the general solution of is (n is an integer). read more ..

Guest Aug 3, 2021

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