All Questions ⁺⁰231263 Questions

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394

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please help

Town A and Town B were located close to each other, and recently merged into one city. Town A had a population with 6% Hispanics. Town B had a population with 12% Hispanics. After the merge, the new city has a total of 4800 residents, with 10.5% Hispanics. read more ..

Guest Feb 16, 2020

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858

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Help Geometry

In right triangle $ABC,$ $AC = BC$ and $\angle C = 90^\circ.$ and Let $P$ and $Q$ be points on hypotenus $\overline{AB},$ as shown below, such that $\angle PCQ = 45^\circ.$ Show that \[AP^2 read more ..

off-topic

Guest Feb 16, 2020

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571

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Permutations & Combinations

Suppose letters of the alphabet are chosen at random to make up words. How many four letter words are possible, if the first and last letter are the same?
Also, how did you know what equation to use? What's an easy way to remember which to use when? read more ..

Guest Feb 16, 2020

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705

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need help please

Carrie places a 10-foot ladder against a wall. If the ladder makes an angle of 65° with the level ground, how far up the wall is the top of the ladder?

Guest Feb 16, 2020

Feb 15, 2020

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853

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help

CH is an altitude of the triangle ABC, m∠A = 60°, m∠B = 45°. Circle with the diameter CH intersects sides AC and BC at points N and M respectively. Find the area (exact value) of the quadrilateral CMHN if AN = 1.

Guest Feb 15, 2020

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660

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+865

Curious about Moderators.

I was just wondering on how users get to be a moderator? I don't really want to be moderator, I was just curious.

AnimalMaster Feb 15, 2020

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1266

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geometry

A ladder leans against the side of a house. The angle of elevation of the ladder is 66°, and the top of the ladder is 13 ft above the ground. Find the distance from the bottom of the ladder to the side of the house.

Guest Feb 15, 2020

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528

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help

The McDonald family drove from Halifax to Montreal on a summer vacation . on the way there , they traveled approx 240km each day , stopping overnight in many different resorts . they stayed in Montreal for 6days . on the way back , they drove about twice read more ..

Guest Feb 15, 2020

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939

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+1487

Geometry

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Dragan Feb 15, 2020

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2168

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venn diagram problem

A school sport team contain 68 students.33 do field events,40 do track events,23 do swimming,14 do both field and track event,8 do both swimming and field events. If 15 students do field events only and 10 do both swimming and track events. How many students read more ..

Guest Feb 15, 2020

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778

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help

Jennifer is twice as old as laurel, who is 4 years younger than nana. If nana is two years younger than Jennifer what is nana’s age in years?

Guest Feb 15, 2020

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623

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help

Peter has a set of polygonal tiles, where all the polygons are regular and have the same side length. He find that two pentagons and a decagon can fit together perfectly, as shown below.

https://latex.artofproblemsolving.com/c/c/c/cccb8f947bb1012a76ea430ee7e84153d95c73f0.png read more ..

Guest Feb 15, 2020

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385

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help!

The closed form sum of for n>= 1 is n(n+1)(n+2)(an+b). Find an+b.

Guest Feb 15, 2020

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359

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help

One plane at 520 feet is ascending at a rate of 40 feet per minute. While another plane at 3800 feet is descending at a rate of 120 feet per minute. How long will take the two planes to be at the same altitude?

Guest Feb 15, 2020

-1

906

5

+288

Help Please and Thank You

Prove that if are complex numbers such that and , then is a real number.

Also some hints came with the question:
1. A number is real if and only if it is equal to its own conjugate. read more ..

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madyl Feb 15, 2020

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10831

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the diagram Shows a sector of a circle radius 10cm and angle 135 degrees find out area

the diagram Shows a sector of a circle radius 10cm and angle 135 degrees find out area

Guest Feb 15, 2020

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474

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please help

Let r be the positive real solution to x^3 + 2/5 x - 1 = 0. Find the exact numerical value of r^2 + 2r^5 + 3r^8 + 4r^11 + ....

Guest Feb 15, 2020

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391

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help

Calculate 1/4 * 2/5 *3/6 * 4*7... * 49/52 * 50/53. Express your answer as a common fraction.

Guest Feb 15, 2020

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829

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help

A one-cup serving of orange juice Contains 4 mg less than four times the amount of vitamin C as a one cup serving of pineapple juice. Servings of two juices contain a total of 121 mg of vitamin C. How many milligrams of vitamin C are in a serving of each read more ..

Guest Feb 15, 2020

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555

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Please help ASAP!

Evaluate the series .

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Guest Feb 15, 2020

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