All Questions

341

ellipses

Let and . Then the set of points such that form an ellipse. The equation of this ellipse can be written as Find

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Guest Oct 4, 2021

384

Help counting

A coin is tossed 10 times. How many different sequences of tosses could there have been, if at least $5$ of the tosses were heads?

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Guest Oct 4, 2021

286

Math on Mobius (Junior Year)

In how many ways can all of the letters of the word PROBLEM be arranged if the arrangement must start with a consonant and end in a vowel?

Guest Oct 4, 2021

433

(2x+x+9)(x-6)

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Guest Oct 4, 2021

309

help

A snack mix recipe calls for 2
15
cups of cheese and
13 read more ..

Guest Oct 4, 2021

409

help counting

What fraction of all the 10-digit numbers with distinct digits have the property that no two odd digits are neighboring?

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Guest Oct 4, 2021

400

Polynomial

Find a monic quartic polynomial f(x) with rational coefficients whose roots include x=1-\sqrt 2 and x=2+\sqrt 2.

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Guest Oct 4, 2021

312

Number Theory

What is the smallest positive integer n such that 2n is a perfect square and 5n is a perfect cube?

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Guest Oct 4, 2021

401

Inequality

Solve the inequality 29/289*z < 16/161*z - 16.

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Guest Oct 4, 2021

491

Greatest Possible Percent Error(Please help ASAP)

The side lengths of a rectangle have been measured to the nearest half of a meter as 7.5 and 18.5. What is the greatest possible percent error in finding the area of the rectangle?

Please show your work.

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Poterparker Oct 4, 2021

427

Counting

How many 10-digit numbers are there, where the sum of the digits is divisible by 8?

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Guest Oct 4, 2021

437

Quadratic equations

The equation y = -6t^2 + 51t describes the height (in feet) of a projectile launched from the surface of Mars at 51 feet per second. In how many seconds will the projectile first reach 120 feet in height?

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Guest Oct 4, 2021

251

Number Theory

A number n has 3 divisors. How many divisors does n^4 have?

Guest Oct 4, 2021

418

help with inequality

Solve the inequality -8r<-12 + 2r.
Enter your answer as an inequality with just r on the left side.

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Guest Oct 4, 2021

329

Counting question

How many positive integers up to 2012 have the ones (units) digit either 1 or 0?

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Guest Oct 4, 2021

440

+21

help please

Points A, B, C, D, E, and F lie, in that order, on , dividing it into five segments, each of length 1. Point G is not on the line through A and F. Point H lies on , and point J lies on . The line segments , , and are read more ..

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needshelp Oct 4, 2021

481

+21

help

is on side of We know and If what is in degrees?

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needshelp Oct 4, 2021

411

help with quadratic

For the graph of a certain quadratic y=ax^2+bx+c, the vertex of the parabola is (3,7) and one of the x-intercepts is (-6,0) . What is the x-coordinate of the other x-intercept?

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Guest Oct 4, 2021

405

precalc

If x is an obtuse angle such that sin(x) = 5/6, then compute cos(x) and tan(x).

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Guest Oct 4, 2021

256

help function

The function f(x) has the domain -1 < x < 1. What is the domain of the function f(2x - 7)?

Guest Oct 4, 2021

527

help please

Triangle WXY has side lengths XY = 14 and WX = 8. The tangent to the circumcircle of triangle WXY at X is drawn, and the line through W that is parallel to this tangent intersects line XY at Z. Find line YZ.
Please use geometry, and please read more ..

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Guest Oct 4, 2021

498

Right triangle

Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AD=4 and DC=8, what is the length of BD? (Note: the figure is not drawn to scale.)

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Guest Oct 4, 2021

424

Trapezoid

One of the bases of a trapezoid has length 10, and the height of the trapezoid is 4. If the area of the trapezoid is 38, then how long is the other base of the trapezoid?

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Guest Oct 4, 2021

420

PLS HELP

https://web2.0calc.com/questions/helpp_87

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Guest Oct 4, 2021

Oct 3, 2021

425

What is the average of the even numbers from 20 to 52?

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Guest Oct 3, 2021

All Questions ⁺⁰237722 Questions

ellipses

Help counting

Math on Mobius (Junior Year)

(2x+x+9)(x-6)

help

help counting

Polynomial

Number Theory

Inequality

Greatest Possible Percent Error(Please help ASAP)

Counting

Quadratic equations

Number Theory

help with inequality

Counting question

help please

help

help with quadratic

precalc

help function

help please

Right triangle

Trapezoid

PLS HELP

What is the average of the even numbers from 20 to 52?

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