All Questions ⁺⁰236350 Questions

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355

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Counting problem

How many ways are there to divide a red bracelet, a yellow bracelet, a green bracelet, and a black bracelet among 4 people if each person can receive at most two bracelets? Each bracelet must be given to someone.

Guest Jan 29, 2022

0

314

1

Maximum value

What is the maximum value of 4(x + 7)(2 - x) + 4(x + 7)(8 - x), over all real numbers x?

Guest Jan 29, 2022

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240

1

digit problem

How many of the 343 smallest positive integers written in base 7 use 0 or 1 (or both) as a digit?

Guest Jan 29, 2022

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294

1

sequences

Find the fifth term of the geometric sequence with first term 2 and second term .

Guest Jan 29, 2022

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317

1

Algebra

For what real values of a is the expression (a + 3)/(a^3 - a) undefined? List your answers in increasing order separated by commas.

Guest Jan 29, 2022

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340

1

a problem i have trouble with

Let 𝑓(𝑥)=⌊𝑥⌊𝑥⌋⌋f(x)=⌊x⌊x⌋⌋ for 𝑥≥0.

(a) Find all 𝑥≥0x≥0 such that 𝑓(𝑥)=1.f(x)=1.
(b) Find all 𝑥≥0x≥0 such that 𝑓(𝑥)=3.f(x)=3.
(c) Find all 𝑥≥0x≥0 such that 𝑓(𝑥)=5.f(x)=5.
(d) read more ..

Guest Jan 29, 2022

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323

1

Number Theory

Find the smallest positive multiple of 21 that has no digit smaller than .

Guest Jan 29, 2022

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337

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Geometry

Two diagonals of a parallelogram have lengths 6 and . What is the largest possible length of the shortest side of the parallelogram?

Guest Jan 29, 2022

Jan 28, 2022

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316

1

Coordinates

Find the value of c such that the three points (5,5), (3,1), and (-6,c) lie on the same line.
Note: Three points are on the same line if the slope of the line through any two points is always the same.

Guest Jan 28, 2022

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214

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ANS/Recursion

Is there an equivalent to the ANS button or another way to do recursion on Web 2.0 Calc?

(The ANS button normally is equal to the answer of the previous calculation)

Guest Jan 28, 2022

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306

1

Geometry

The circle below centered at O has a radius of 5. Find CD.

Guest Jan 28, 2022

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326

2

+10

(okay i know the answer to this problem) QUIZ!

A certain triangle's interior angles have a ratio of 1:2:3. If the shortest side length is 12, what is the length of the longest side?

SparkleDew Jan 28, 2022

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306

1

Geometry

Triangle ABC is isosceles with AB = BC. If AB = 20 and [ABC] = 240, then find the perimeter of triangle ABC.

Guest Jan 28, 2022

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253

1

Fibonacci

In the first 103 numbers of the Fibonacci sequence, how many are divisible by ?

Guest Jan 28, 2022

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324

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3d Counting

Let S be a cube. Compute the number of planes which pass through at least 3 vertices of S

Guest Jan 28, 2022

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351

2

Base Numbers

How many zeroes do we write when we write all the integers from 1 to 256 in binary?

Guest Jan 28, 2022

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321

1

Algebra

The expression 3x^2 + 10x + 8 can be written in the form (3x + A)(x + B) where A and B are integers. What is the value of A - B?

Guest Jan 28, 2022

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247

1

Algebra

The roots of the quadratic equation z^2 + az + b = 0 are -7 + 3i and -7 - 3i. What is a + b?

Guest Jan 28, 2022

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251

1

Algebra

Find all pairs (x,y) of real numbers such that x + y = 10 and x^2 + y^2 = 56 - 3xy. For example, to enter the solutions (2,4) and (-3,9), you would enter "(2,4),(-3,9)" (without the quotation marks).

Guest Jan 28, 2022

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321

1

Complex Numbers

Simplify (1-i)/(2+3i-3+i), where i^2 = -1.

Guest Jan 28, 2022

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187

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Modular Arithmetic

What is the smallest integer n, greater than 1, such that 1/n (mod 130) and 1/n (mod ) are both defined?

Guest Jan 28, 2022

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356

1

If you have three pennies, one nickel, two dimes and one quarter, how much money do you have?

If you have three pennies, one nickel, two dimes and one quarter, how much money do you have?

Guest Jan 28, 2022

+1

356

2

+1632

analytic graphing geometry help

Please help me with this question:

The square with vertices is cut by the line into congruent quadrilaterals. The perimeter of one of these congruent quadrilaterals divided by equals what? Express your read more ..

proyaop Jan 28, 2022

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