All Questions ⁺⁰237827 Questions

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413

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+80

Help please

Find the centroid of the triangle with vertices (1, 4, -1), (-4, 5, 2), and (6, -1, 7).

jleung Aug 10, 2021

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484

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Probability

Each of the digits 0-9 is written on a slip of paper, and the slips are placed in a hat. If 5 slips of paper are selected at random, determine the probability that the 5 numbers selected are greater than 3.

Guest Aug 10, 2021

+1

433

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Algebra

Let a and b be the roots of 2x^2+7x+11=0. Find a + b.

Guest Aug 10, 2021

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401

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Help graphing

The graphs of x^2-2x+y^2+10y=4x-8y+127. Find the radius of this circle.

Guest Aug 10, 2021

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462

1

help please

find a monic polynomial of lowest possible degree with rational coefficeients and having both 2 and 8-i roots.

Guest Aug 10, 2021

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497

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+80

Help please

jleung Aug 10, 2021

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430

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+80

Help please

A median of a quadrilateral connects the midpoint of one side of the quadrilateral to the midpoint of the opposite side of the quadrilateral. Show that the diagonals of a quadrilateral are perpendicular if and only if the medians of the quadrilateral are read more ..

jleung Aug 10, 2021

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303

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help polynomial

When the polynomial p(x)=Ax^21+Bx^17+Cx^9+8 is divided by x-5 the remainder is 12. find the remainder when P(x) is divided by x+5.

Guest Aug 10, 2021

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303

0

Help please

We call quadrilateral ABCD is a kite if AB = BC and CD = DA (or if BC = CD and DA = AB). Use vectors to show that the diagonals of a kite are perpendicular.

Guest Aug 10, 2021

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439

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+80

Help please

(a) Use vectors to prove that if the diagonals of quadrilateral ABCD bisect each other, then ABCD is a parallelogram.
(b) Use vectors to prove that the midpoints of the sides of any quadrilateral are the vertices of a parallelogram.

jleung Aug 10, 2021

Aug 9, 2021

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430

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Algebra

One of the roots of 2x^3-9x^2+18x+k=0 is x=2.Find the other 2 roots. Explain how you got the answer.

Guest Aug 9, 2021

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526

1

Polynomials

What is the coefficient of x^2 when -5x^3 - 5x^2 - 7x + 1 is multiplied by -x^2 + 6x + 1 and the like terms are combined?

Guest Aug 9, 2021

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491

1

Answer ASAP tyty

To be able to walk to the center C of a circular fountain, a repair crew places a 16-foot plank from A to B and then a 10-foot plank from D to C, where D is the midpoint of AB. What is the area of the circular base of the fountain? Express your answer read more ..

Guest Aug 9, 2021

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442

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Algebra

Jason has 4 gallons of hand sanitizer that contains 25% alcohol. He wants to make a hand sanitizer that contains 50% alcohol. How many gallons of pure alcohol should he add?

Guest Aug 9, 2021

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464

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I'm confused. Please help.

does 2x +7=3x +1?

Guest Aug 9, 2021

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507

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Polynomial

Given that the polynomial x^2-kx+160 has only positive integer roots, find the average of all distinct possibilities for k.

Guest Aug 9, 2021

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478

2

stuck on this question...all help appreciated

Factor x^k - y^k.

Guest Aug 9, 2021

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543

1

Geometric Sequence

Find the 7th term of sqrt(2), sqrt(10), 5*sqrt(2), ...

Guest Aug 9, 2021

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412

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Help Please! Thanks!

The sequence is defined by and for Prove that ] for all

My Work: I wrote the relationship as I rearranged this to get
read more ..

Guest Aug 9, 2021

0

431

1

+31

Help ASAP

Find all complex numbers z such that z^4=-4
Note: All solutions should be expressed in the form a+bi, where a and b are real numbers.

Thanks, read more ..

soccerfan123 Aug 9, 2021

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566

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+47

Need help FAST

In base b, there are exactly one hundred three-digit numbers whose digits are all distinct. (That's "one hundred" in the ordinary sense, 100 base 10.)
What is b?

SmartCookiezZ Aug 9, 2021

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441

1

Function

Let
p(x) = x - 2y
What is p(p(1,-1),p(-5,-2))?

Guest Aug 9, 2021

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382

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Math

James had 1/8 as many pencils as Mark. When Mark gave half of her pencils to James, he then had 12 fewer pencils than he had. How many pencils did Mark have at first?

Guest Aug 9, 2021

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419

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geometric sequence

The 4th term of a geometric sequence is 18, and the 10th term is 162. What is the 7th term?

Guest Aug 9, 2021

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448

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Can i get some help with modulos?

Suppose where

What is the vaule of ?
read more ..

Guest Aug 9, 2021

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