Math

Refine Search

What is the bar model?

The bar model is typically used in elementary level math as a pictorial approach to solving addition and subtraction problems. The bar model helps students visualize the difference between the numbers given and the amount they are looking for in a word problem. The model starts with addition and subtraction, but can be expanded to more difficult elementary level problems such as multiplication, division, fractions, ratios and percents.

Continue Reading

What are similar terms in algebra?

Combining similar terms is a way to simplify algebraic expressions in order to make them easier to work with. For example, the equation 7xy - 4xy + 4x^2 + 5x^2 can be simplified by combining its similar terms. The terms that share variables and that are raised to the same power are 7xy and -4xy, as well as 4x^2 and 5x^2. When similar terms are combined, the equation reads 3xy + 9x^2.

Continue Reading

What is a 2x2 factorial design?

If an experiment involves one three-level independent variable and one two-level independent variable, it is a three-by-two factorial design with six different sets of conditions for study. Although most experiments involve only one independent variable, according to CSU Fresno, factorial design experiments provide the opportunity to study the effects of variables more efficiently while more realistically replicating real-world conditions.

Continue Reading

Where can you find some good examples of geometric coloring pages?

Colorwithfuzzy.com offers simple to complex geometric coloring pages. The site features 3-D cubes, pyramids, mosaics and tiled patterns among others. The downloadable coloring pages are in PDF format.\nGeometrycoloringpages.com offers over free 100 printable geometric coloring images. The site also offers a geometric coloring book that contains unique patterns in black and white. The book is available as an e-book or in paperback.\nSurfnetkids.com offers stunning and complex geometric patterns. Most of the designs include interwoven shapes and overlapping circles that cater to individuals who ..

Continue Reading

What's the history of Fibonacci?

Fibonacci was born in Pisa, Italy, around 1175 A.D. In his youth, he studied mathematics in North Africa while traveling to various countries with his father, who was a diplomat. Once he returned to Italy as an adult, he wrote several works concerning mathematics. His most famous piece was "Liber Abaci," written in 1202. In later life, he probably served as an adviser to the local government of Pisa.\nIn the early Middle Ages, Roman numerals were still in use. However, Fibonacci's works highlighted the benefits of the Hindu-Arabic number system. He also introduced the modern decimal syste..

Continue Reading

What is a numeric constraint?

For example, if a designer were working with two shapes that overlapped but wanted to give each of these shapes distinct properties, he would use numeric constraints. Constraints could be set to encompass each of the two shapes to keep them separate from each other in the design program. Conditions would then be set for each numeric constraint and applied to the corresponding shape.

Continue Reading

What is a contextual variable?

In the field of information technology and specifically the study of data sets, a contextual variable is constant within the group and is calculated based on other variables within the group, which may or may not remain constant.In the study of sociology or business, contextual variables may involve elements such as technology, financial resources and local environments or cultures, and how these affect specific industries or populations.

Continue Reading

What is 10 to the 6th power?

Working with powers of 10 can be easily visualized by adding a zero each time the power increases by one. Ten to the second power is 10 times 10, or 100. Ten to the third power is 10 times 10 times 10, which equals 1,000. Ten to the fourth power is 10,000. Ten to the fifth power is 100,000, and so on. In the above example, the number 10 is called the "base," and the number 6 is called the "power" or "exponent."

Continue Reading

What does a 45-degree angle look like?

One way to create a 45-degree angle is to start with a straight line, then use a compass to create a perpendicular bisection, then finally create a bisection of the first straight line and the perpendicular bisection.\nIt is also possible to draw a 45-degree angle without a compass by using graph paper. Because a 45-degree angle has a slope of 1, one can create the angle by plotting points (x,y) starting from the origin (0,0) where x and y are the same value. For example, by plotting points (0,0), (1,1), (2,2) and so forth, and then drawing a straight line between these points, the line create..

Continue Reading

Is the sum of two even numbers always even?

An even number is defined as any number that has 2 as a factor. For example, 2, 4, 6, 8 and 10 are all even numbers. Any number without 2 as a factor is odd, like 3, 5, 7 and 9. Because 2 is a factor of all even numbers, it can be factored out. The sum of x+y then looks like this: 2*(x/2+y/2). No matter what the numbers inside the brackets are, after being multiplied by 2, the final result will then have 2 as a factor, which makes it even.

Continue Reading
Showing 21 to 30 of 3956 (396 Pages)