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217

Equation

The equation of the line passing through (1,11) and (-4,5) can be expressed in the form x/a + y/b = 1. Find a.

Guest Jun 18, 2022

304

+111

Math

F+C = 280 (1)

(1 + 1/5)C + (1 + 3/20)F = 328 (2)
read more ..

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Ticon6 Jun 18, 2022

221

Function

If f(x) is a function whose domain is [-1,9], and g(x)=f(2x), then the domain of g(x) is an interval of what width?

Guest Jun 18, 2022

234

difficult congruency questions

1) Given that a^20 congruent 1 (mod 25) for all integers a such that gcd(a, 25) = 1. Find the last 2 digits. of 287^449 2) Solve the congruence equation x^10 + 11x^8 + 44x^6 + 25x^2 + 12x congruent 3 (mod 55)

Guest Jun 18, 2022

251

Number Theory

When N is divided by 10, the remainder is a. When N is divided by 13, the remainder is b. If a = 5 and b = 6, what is N modulo 130?

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Guest Jun 18, 2022

249

Number Theory

How many integers between 1 and 1,000,000 are relatively prime to 1,200,000?

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Guest Jun 18, 2022

266

number theory question

let n = 12! + 231. 1. Determine the sum of the positive perfect cube divisors of. 2.Determine the product of the positive divisors of n. Express your answer in prime factorization. 3. Determine the product of the perfect square divisors of n. Express your read more ..

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Guest Jun 18, 2022

299

+252

The expression x^5 + y^5 can be written as the product of x + y and another factor. Find that other factor.

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Blizzardshine Jun 18, 2022

269

HELPPPPP

or positive integers ,\[
\dfrac {1}{a + \dfrac {1}{b + \dfrac {1}{c}}} = \dfrac38
\ , and , such that
what is the value of the product ?

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Guest Jun 18, 2022

268

Need help. Many thanks.

Andrew, Bernard and Cathy shared a box of cupcakes. Andrew received 2/5 of the box of cupcakes and 2/5 of a cupcake. Bernard received 2/5 of the remaining box of cupcakes and 3/5 of a cupcake. If there was only 6 cupcakes left for read more ..

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Guest Jun 18, 2022

286

help

Two $3 \times 4$ rectangles overlap, as shown below. Find the area of the overlapping region (which is shaded)

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Guest Jun 18, 2022

290

help plz

In a rhombus, all the side lengths are $10,$ and one of the angles is equal to $120^\circ.$ Find the area of the rhombus.

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Guest Jun 18, 2022

214

Rational equations

Find the sum of all x that satisfy the equation -9x/(x^2 - 1) = 2x/(x + 1) - 6/(x - 1) + 14/(x^2 - 1).

Guest Jun 18, 2022

222

Piecewise Defined Functions

For real numbers x, let
f(x) = x + 2 if x > 3
f(x) = x + a if x <= 3
read more ..

Guest Jun 18, 2022

220

Coordinate geometry

Let k be a positive real number. The line x + y = k and the circle x^2 + y^2 = 2k + 1 are drawn. Find k so that the line is tangent to the circle.

Guest Jun 18, 2022

211

Congruence

Find all numbers r for which the system of congruences
x = r (mod 6)
x = 3 (mod 20)
x = 13 (mod 45) read more ..

Guest Jun 18, 2022

267

Rate problem

For travel from Washington DC to Baltimore by car, a constant speed of 60 mph was maintained. For the return trip, there was a constant speed of 40 mph. What was the average speed over the whole two-way trip?

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Guest Jun 18, 2022

258

number theory question please help

Let m = 98! + 99! and n = 6^50. Find the number of trailing zeros in m. Find gcd(m, n). Do NOT simplify.

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Guest Jun 18, 2022

285

help idk this

An equilateral triangle is constructed on each side of a square with side length $2,$ as shown below. The four outer vertices are then joined to form a large square. Find the side length of the large square.

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Guest Jun 18, 2022

343

+252

find all pairs of integers (x,y) that satisfy the equation xy-2x+7y=49

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Blizzardshine Jun 18, 2022

246

Integers

For how many integers n where 2 <= n <= 100 is n/2 odd?

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Guest Jun 18, 2022

265

counting problem

How many 5-digit numbers are there, where the leftmost digit and the rightmost digit are both even?

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Guest Jun 18, 2022

213

Probability

A cook has 10 red peppers and 5 green peppers. If the cook selects 6 peppers at random, what is the probability that he selects at least 3 green peppers? Express your answer as a common fraction.

Guest Jun 18, 2022

299

Algebra

What is the sum of all real values of x that satisfy the equation (x-3)(x^2+4x+4)=x-3+x^3-7x+8?

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Guest Jun 18, 2022

283

Inequalities

What is the sum of all integers x that satisfy 4 - x >= 3 and 3x + 15 >= 2?

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Guest Jun 18, 2022

All Questions ⁺⁰237779 Questions

Equation

Math

Function

difficult congruency questions

Number Theory

Number Theory

number theory question

The expression x^5 + y^5 can be written as the product of x + y and another factor. Find that other factor.

HELPPPPP

Need help. Many thanks.

help

help plz

Rational equations

Piecewise Defined Functions

Coordinate geometry

Congruence

Rate problem

number theory question please help

help idk this

find all pairs of integers (x,y) that satisfy the equation xy-2x+7y=49

Integers

counting problem

Probability

Algebra

Inequalities

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