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What are some things that come in groups of seven?

Groups of seven found in science include the number of official measurements in the International System of Units, the number of the major stars of Big Dipper constellation, the cervical vertebrae of most mammals, the periods on the periodic table of elements and the seven colors of the rainbow identified by Newton.\nReligious groups of seven include the number of blessings at a Jewish wedding, the layers of the Earth in Islam, the Hindu seven worlds in the universe, the Seven Sorrows and the Seven Joys of the Virgin Mary and Jesus' last sayings on the cross. In the Old Testament, there a..

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What is the square root of 244?

244 is an imperfect square since the square root of it does not result in a whole number. Perfect squares result in the original number when the square root is derived. For instance, 2 times 2 = 4, so the square root of 4 is 2. This is an example of a perfect square. The mathematical symbol used in a square root equation is called a radical. While determining the square root of perfect squares is simple by hand, imperfect squares are harder to figure without a calculator.

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How many endpoints does a ray have?

When two rays share a common endpoint, they form an angle. The endpoint is called the vertex, and the two rays are called arms. If the two rays overlap, the angle measures 0 degrees and appears as one ray. If the two rays point in exactly opposite directions, the angle measures 180 degrees and appears as a straight line. Any other combination of the two rays results in an angle between 0 degrees and 360 degrees.

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What are some good algebra problem solvers?

Mathway.com also offers tools that can solve problems from basic math all the way up to calculus. The site includes a section with tools for solving problems in chemistry.\nAnother online math resource that can help students solve algebra problems is WolphramAlpha.com. This site offers similar tools that can help ease any troubles that students come across in the field of mathematics.

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How do you find solutions to math problems for free?

Mathway also gives solutions for trigonometry, precalculus, calculus, statistics, finite math, linear algebra and chemistry problems. Students just need to type their problems in the question textbox, and then click the blue Answer button to receive the answer. In the free version, the steps for how to figure out the solution are blurred out. Other free sites include Web-Math and Basic-Mathematics. The Basic-mathematics site has a similar approach as Mathway. Web-Math lets users practice working with fractions and provides visualizations about what fractions mean using detailed pie charts. The..

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What is used to support the steps of a geometric proof?

If the statement of what needs to be proved is not included with the problem, it may be researched or re-created by changing the information that is already given. The given is written as a geometric shorthand above or near the proof. It consists of the hypothesis and the facts required to prove the proof.\nDrawing a picture not only illustrates the proof, but aids in plugging in values needed to prove it. The image drawn reflects what is being proved. The image should be large enough to easily view and include all labels such as A, B, C and D. Any additional mathematical facts such as congrue..

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How do you find the standard deviation?

Consider a case in which five students take a test. The material was apparently quite difficult because the five grades were 60, 47, 30, 43 and 17, and the principal wants to know the statistical measures for these students. Add up the five numbers and divide by five for the mean: 39.4.\nEach student's difference from the mean is 20.6, 7.6, 3.6, -9.4 and -22.4. Square each of these numbers and add them together to get a sum of 1,085.2. Divide this by five (the number of the terms) to get 217. This is the variance, so take the square root of this to get the standard deviation, which is 14...

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How many bowls of cereal does the average American eat annually?

In 2006, NBC's "Today" show reported that 49 percent of all Americans eat cereal for breakfast. It cited a September 2005 study from the National Institutes of Health that showed adults and children who ate cereal had healthier body weights than those who did not eat cereal. "Today" recommended unsweetened cereals with at least 3 grams of dietary fiber in every ½-cup serving. Fox News Insider reported on a 2014 study from the Environmental Working Group that indicated eating a bowl of children's cereal daily for a year was equal to consuming 10 pounds of sugar.

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What are some challenging Algebra I questions and answers?

The example question can also be solved by factoring. If the equation is divided by 2, making it x^2 +x-2=0, the equation factors to (x-1)(x+2) =0, which again becomes x =1 or x = -2.\nAnother type of problem that often challenges Algebra I students is word problems, such as rate-time-distance problems, age problems, interest rate problems, number problems and price problems. An example of a price problem is: Wilma spends $42 on a pair of shoes, which is $14 less than twice what she spent on stockings. How much were the stockings? The solution is to let the price of stockings = x, then 42=2x ..

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How is math used for roller coasters?

Roller coaster engineers work hard to develop new roller coasters. They first begin with an idea of what they want the latest and greatest roller coaster to be. They then put this idea onto paper. The engineers must calculate the perfect angles, heights and directions that will allow the roller coaster to reach great speeds without going off of the track. They use many machines, test coasters and models to come up with the perfect angles.\n\nEngineers must first be sure that the angles and measurements work in the right way before they can go back to designing the actual roller coaster. They c..

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