All Questions

220

counting

Alejandra's Tapas Bar offers a menu consisting of 9 savory and 6 sweet dishes. You can also get a mix-and-match plate consisting of two different dishes on the menu. How many different mix-and-match plates can you get in total?

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Guest Jun 20, 2022

207

number theory

Suppose that x, y, z are positive integers satisfying x <= y <= z, and such that the product of all three numbers is twice their sum plus 2. What is the sum of all possible values of z?

Guest Jun 20, 2022

274

trapezoid

In trapezoid PQRS, Base PQ is parallel to base RS. Let point X be the intersection of diagonals PR and QS. The area of triangle PQX is 20 and the area of triangle RSX is 48. Find the area of trapezoid PQRS

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Guest Jun 20, 2022

293

I do not understand what does it mean by smudges?

I need only b)
Thanks in advance for the help

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Guest Jun 20, 2022

216

System

find the value of k for which the system of equations has a unique solution 2x+ky-9=0 , kx+3y-13=0.

Guest Jun 20, 2022

307

How do I calculate this probability?

Thanks in advance for the help

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Guest Jun 20, 2022

218

combinatorics question

Thanks in advance for the help

Guest Jun 20, 2022

211

Melody please help

Someone in my 4th grade knows how to do algebra statistics and calculus please help me I wanna do that too.

Guest Jun 20, 2022

326

my account has been deleted

My username is solveit and for some reason my account doesn't exist anymore. I was high on the top users list.

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Guest Jun 20, 2022

352

Smoot = 67 inches ?

A smoot is a unit of measurement equal to $5$ feet, $7$ inches, named for an MIT student who was used to measure a bridge. The MIT campus is $168$ acres. What is the area of the MIT campus, in square smoots? Round your answer to $3$ significant digits, read more ..

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Guest Jun 20, 2022

350

polynomial

If one zero of the polynomial 3x^2 + 12x - k is reciprocal of the other , then find the value of k.

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Guest Jun 20, 2022

341

help coordinates

Given that the point (9,7) is on the graph of y=f(x), there is one point that must be on the graph of 2y = 2f(x). What is the sum of coordinates of that point?

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Guest Jun 20, 2022

261

Graphs

The graph of y = f(x) is shown in red below. For how many values of c is f(c) = -1?

read more ..

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Guest Jun 20, 2022

274

counting

The people living on the island of Gibberish use the standard Kobish alphabet ( letters, A through M). Each word in their language is 4 letters or less, and for some reason, they insist that all words contain the letter A at least once. How many read more ..

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Guest Jun 20, 2022

333

help math

Given any positive even integer, x, the positive difference between the smallest odd number greater than 9x - 2 and the largest odd number less than 8x + 3 can be written in the form ax + b. What is a + b?

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Guest Jun 20, 2022

267

help counting

How many triples (a,b,c) of even positive integers satisfy a^3 + b^2 + c <= 30?

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Guest Jun 20, 2022

270

quadratic

A ball is thrown from an initial height of 3 meters with an initial upward velocity of 20m/s. The ball's height (in meters) after seconds is given by the following h=3+20t-5t^2. Find all values of for which the ball's height is 13 meters.

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Guest Jun 20, 2022

271

HALP

The sum of three consecutive positive integers is a perfect cube. Find the least possible value of the smallest number, assuming that the middle number ends in at least 5 zeros.

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Guest Jun 20, 2022

331

+17

A bit stuck on this problem that has to do with the Cartesian Plane...

Find the value of if the graph of passes through the point and is parallel to the graph of .

I thought it was sort of easy at first, but then I got stuck on a step. Can you provide a detailed explanation? read more ..

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ChocoSwirl Jun 20, 2022

279

geometry

n triangle $ABC,$ $M$ is the midpoint of $\overline{AB}.$ Let $D$ be the point on $\overline{BC}$ such that $\overline{AD}$ bisects $\angle BAC,$ and let the perpendicular bisector of $\overline{AB}$ intersect $\overline{AD}$ at $E.$ If $AB = 44,$ $AC = read more ..

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Guest Jun 20, 2022

Jun 19, 2022

303

help counting

The product of the digits of 3214 is 24. How many distinct four-digit positive integers are there such that the product of their digits equals 18?

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Guest Jun 19, 2022

262

Counting

How many arrangements of the numbers {1, 2, 3, ..., 7, 8} are there where the sum of any two adjacent numbers is odd?

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Guest Jun 19, 2022

340

How do I solve this probability question?

I need b and c, thanks in advance.

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Guest Jun 19, 2022

368

+349

integration by parts

using integration by parts, find $\displaystyle \int [ln(x)]^2 dx$

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hipie Jun 19, 2022

All Questions ⁺⁰237779 Questions

counting

number theory

trapezoid

I do not understand what does it mean by smudges?

System

How do I calculate this probability?

combinatorics question

Melody please help

my account has been deleted

Smoot = 67 inches ?

polynomial

help coordinates

Graphs

counting

help math

help counting

quadratic

HALP

A bit stuck on this problem that has to do with the Cartesian Plane...

geometry

help counting

Counting

How do I solve this probability question?

integration by parts

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