All Questions ⁺⁰237680 Questions

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301

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Geometry

Luann has a platter made out of a square, with semicircles of diameter 12 inches on each edge, as shown. What is the side length of the smallest square that can contain the platter, in inches?

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Guest Oct 3, 2021

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435

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PLS ANSWER YOU FORGOT

https://web2.0calc.com/questions/pls-help-tq_1

Guest Oct 3, 2021

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316

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HELP PLS AND TY

I need major help with this math problem and if you can help me asap, that would be amazing.

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Guest Oct 3, 2021

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313

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Counting

How many numbers from 1 to 125 are perfect powers? (A perfect power is a number of the form a^b, where a > 1 and b > 1.)

Guest Oct 3, 2021

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317

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Counting

In how many ways can you spell the word FOOT in the grid below? You can start on any letter F, then on each step you can step one letter in any direction (up, down, left, right, or diagonal)

\begin{array}{cccc} F & F &read more ..

Guest Oct 3, 2021

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390

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Counting

1. Nine points are arranged in a 3 x 3 grid, as shown below. In how many different ways can you choose three points, so that they form a triangle?

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Guest Oct 3, 2021

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439

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help please

The Cookie Monster encounters a cookie whose boundary is the equation $x^2+y^2 - 6 = 6x + 2 y$ and is very confused. He wants to know if this cookie is a lunch-sized cookie or a snack-sized cookie. What is the radius of this cookie?

Guest Oct 3, 2021

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352

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quick problem

Let $ABCDE$ be a pentagon inscribed in a circle such that $AB = CD = 3$, $BC = DE = 10$, and $AE= 14$. The sum of the lengths of all diagonals of $ABCDE$ is equal to $\frac{m}{n}$, where $m$ and $n$ are relatively prime positive integers. What is $m+n$ read more ..

Guest Oct 3, 2021

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377

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Counting question

Find what percent of the perfect squares less than 1000 that ends in a 1. (Don't forget that zero is a perfect square.)

Guest Oct 3, 2021

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406

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why is cphil gone?

I recently noticed that CPhil got removed from top users... is he ok?

Guest Oct 3, 2021

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267

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help im stuck

Show that if a, b, c, and d are positive numbers such that a + b = c + d = 10 and a and b are farther apart than c and d, then ab < cd.

Right now i know that ab = a(10-a) and cd = c(10-c), but i dont know how i should continue read more ..

Guest Oct 3, 2021

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443

1

Coordinates

The pentagon ABCDE is graphed on a coordinate plane with vertices A(0, 0), B(3, 5), C(3, 8), D(8, 5), and E(8, 0). What is the pentagon's area?

Guest Oct 3, 2021

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405

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help geometry

In a certain isosceles right triangle, the altitude to the hypotenuse has length 8. What is the area of the triangle?

Guest Oct 3, 2021

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273

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need NT help

What is the sum of all positive integers n that satisfy lcm[n,100]=gcd(n,100)+200?

Guest Oct 3, 2021

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397

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Circle equation

A circle has centre (0,0). The point (15,9) is a point on the circle. Find the equation of the circle.

Guest Oct 3, 2021

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424

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Function

A function is defined by f(0) = 0 and f(n) = f(n - 1) + 2n + 1 for n > 0. Find f(4).

Guest Oct 3, 2021

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466

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Number Theory

Find the largest integer n for which 12^n evenly divides 20.

Guest Oct 3, 2021

Oct 2, 2021

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416

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test scores

Natasha wants to average at least 90% in math class. Her test scores so far are 94%, 89%, 88%, 92% and 85%. What score does she need on her next test to reach her goal?

Guest Oct 2, 2021

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467

1

tysmm

David, Peter and Andrew shared a bag of sugared buns. David took
1/2 the bag of sugared buns and half a bun. Peter took 1/2 the remaining bag
of sugared buns and half a bun. Andrew took the rest. If Andrew
received read more ..

Guest Oct 2, 2021

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500

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Pls help. Tq

A total of 420 green marbles and red marbles were put into Box A
and Box B respectively. There were 1 1/2 times as many red marbles as
green marbles. Some yellow marbles were put into Box B. For every
3 green marbles read more ..

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Guest Oct 2, 2021

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399

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Algebra

The quadratic 3x^2-24x+72 can be written in the form a(x+b)^2+c, where a, b, and c are constants. What is a+b+c?

Guest Oct 2, 2021

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383

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Exponents

If 5^x=100, what is the value of 5^(2x)?

Guest Oct 2, 2021

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252

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help algebra

Find the constant term in the expansion of
\[\left( 2z - \frac{1}{z} \right)^{10}.\]

Guest Oct 2, 2021

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