All Questions ⁺⁰238211 Questions

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812

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help

Find the smallest positive integer that is exactly half the sum of its proper divisors.

Guest Nov 17, 2019

-1

1536

3

Help please

Let $ABCD$ be a trapezoid with bases $\overline{AB}$ and $\overline{CD}.$ Let $AD=5$ and $BC=7,$ and let $P$ be a point on side $\overline{CD}$ such that $\frac{CP}{PD}=\frac{7}{5}.$ Let $X,Y$ be the feet of the altitudes from $P$ to $\overline{AD},$ $\overline{BC}$ read more ..

Guest Nov 17, 2019

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1290

3

help

How many terms are in the expansion of the expression [(3x + 2y)^2 (3x - 2y)^2]^3 after it is simplified to lowest terms?

Guest Nov 17, 2019

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1162

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+312

NUMBER THEORY

What is the greatest common factor of 20! and 200,000? I got 20,000, but that is incorrect. Explain your method.

CalculatorUser ●●

mathleteig Nov 17, 2019

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681

7

help

One day, Mr Tan tested his five children, "Suppose I count from 1 to 2015 on my left hand's fingers. I begin on my thumb and work my way to my little finger and back to my thumb again (without skipping a finger) and just keep repeating this. On which finger read more ..

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Guest Nov 17, 2019

+2

891

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+312

QUADRILATERALS

A square with sides 6 inches is shown. If P is a point such that the segment PA, PB, PC are equal in length, and segment PC is perpendicular to segment FD, what is the area, in square inches, of triangle APB?

mathleteig Nov 17, 2019

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2679

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angular geomtery

In the diagram, AB is parallel to DC and ACE is a straight line. What is the value of x?

Guest Nov 17, 2019

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772

1

help

Bangladesh & India are playing a five match odi series.If any team wins first 3 matches,then the series is over. The two teams are equally strong.What is the probability that the series will be over in 3 matches?

Guest Nov 17, 2019

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1015

1

help

A triangle with sides of 5, 12, and 13 has both an inscribed and a circumscribed circle. What is the distance between the centers of those circles?

Guest Nov 17, 2019

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950

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coordinate plane

The rectangle with vertices (-1,y), (7,y) (7,3) and (-1,3) has an area of 72 square units, and y is positive. What is the value of y?

CalculatorUser ●

Guest Nov 17, 2019

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648

1

geometry

In the diagram, G is the centroid of If the area of ABC=72, then what is the area of GME?

Guest Nov 17, 2019

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487

1

Math

MS. Moua has 20 students in her first-grade class. How many ways can she choose 5 of them to ride in her van for a class field trip? (The rest go with parents from the class).?

Guest Nov 17, 2019

+1

842

1

help

Rectangle ABCD has all integer side lengths and its interior is divided into seven non-overlapping rectangular regions: two 8 by 10 regions, a 10 by 12 region, a 13 by 5 region, a 13 by 13 region, a 10 by 22 region and a 3 by 16 region. All linear measurements read more ..

Guest Nov 17, 2019

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985

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Pls Help

Any help on this question will be greatly apprectiated.

Let A and B be two points on the hyperbola xy=1, and let C be the reflection of B through the origin.
(a) Show that C is on the hyperbola.
(b) Let be the read more ..

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madyl Nov 17, 2019

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780

1

help now please

Guest Nov 17, 2019

-1

840

1

+3

algebra help please

Given that -3<=7x+2y<=3 and -4<=y-x<=4 what is the largest possible value of x+y

oneoh Nov 17, 2019

+3

2725

7

+312

GEOMETRY V

An equilateral triangle has sides of length 2 units. A second equilateral triangle is formed having sides that are 150% of the length of the sides of the first triangle. A third equilateral triangle is formed having sides that are 150% of the length of read more ..

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mathleteig Nov 17, 2019

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1503

1

+312

CLOCK ANGLES

At 2:48, what is the degree measure of the smaller angle formed by the hour and minute hands of a 12-hour clock?

mathleteig Nov 17, 2019

Nov 16, 2019

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784

2

+4

Pearson

Last weekend, Amy raked leaves in her front yard. She noticed that 11/3 pounds of leaves filled 4/9 of a bag. What is the unit rate for pounds of leaves per bag?

gracelynn Nov 16, 2019

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899

2

help

From a square piece of cardboard measuring 2a on each side a box with no top is to be formed by cutting out from each corner a square with sides b and bending up the flaps, For what value of b (in terms of a) will the box contain the greatest volume? read more ..

Guest Nov 16, 2019

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767

1

+158

Adv. Inequalities

Let and be nonnegative real numbers such that . Find the maximum value of

AoPS.Morrisville Nov 16, 2019

0

808

1

I don't understand how to do this

An ellipse has its center at the origin, its foci on the y-axis, and its major axis is three times as long as its minor axis. Given that the ellipse passes through the point (-4,0), find its equation.
Express your answer in the form (x-a)^2/r^2 read more ..

Guest Nov 16, 2019

0

1

927

3

help

Find the sum of the orange angles. Give a complete explanation.

Gadfly ●●●

Guest Nov 16, 2019

0

542

0

Help

Ros runs a dance class. She wants to ask her students if they would prefer to start the class at 7 pm or 8 pm. There are 46 students in the class. Should Ros ask all the students in the class or should she ask a sample of the students? Explain your answer. read more ..

Guest Nov 16, 2019

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