Math

Refine Search

What is a relation in math?

When finding the range for sets of ordered pairs, only the elements utilized in the relation make up the range. An example of this is using the following information: set A (x-values) contains the points (2, 4 and 3), set B has (y-values) with points (1, 6, 7, 8, 9 and 5) and the relation given is the set of ordered pairs (2,6), (4,6) and (3,7). In this example, the domain is (2, 4 and 3), the x-values of the ordered pairs of the given relation, while the range is (6 and 7), or the y-values. It is evident that not all the points contained in set B were used.

Continue Reading

What is a simultaneous equation solver?

A user enters the coefficients of x and y for both equations into the boxes provided and clicks "solve" to produce results. By the elimination method, equations x + y = 3 and 2x + 3y = 4 are solved by first multiplying equation (1) by 2 to give the same coefficient for x. This produces 2x + 2y = 6 and 2x + 3y = 4. Subtracting the first equation form the second gives y = -2, which can be substituted in x + y = 3 to give x = 5.

Continue Reading

What are the steps to calculating a percent?

For example, to calculate what 25 percent of 80 is, first convert 25 percent to a decimal value by dividing by 100. To do this, move the decimal place two places to the left, for a decimal value of 0.25. Next multiply the original number, 80, by the decimal value, 0.25. The result is 20, so 25 percent of 80 is 20.\nIf starting with the whole numbers and needing to find the percent value, reverse the operation. To calculate what percentage 20 is of 80, first divide 20 by 80. The result is a decimal value of 0.25, which must be multiplied by 100 to convert it to a percentage value. To do this, m..

Continue Reading

What is a growing pattern in mathematics?

Teachers often use patterns to simplify mathematical concepts for kindergarten students. By recognizing patterns, schoolchildren are able to identify the "core," which is the basic unit that repeats in a pattern. Growing patterns can involve different objects, figures, shapes, sounds, movements or numbers. The opposite of a growing pattern is called a "shrinking pattern," which decreases through the subtraction of an element.

Continue Reading

How do you multiply rational expressions?

Simplify the fractionsSimplify the fractions the same way you do when multiplying regular fractions. Use cancelling, common denominators and common factors between the top and bottom rows to get a simplified equation. Multiply the numbers and expressions across the top rows Write the answer on the top row. Multiply the numbers and expressions across the bottom rowsWrite the answer on the bottom row. Simplify again if necessaryCheck the final answer to ensure it can't be reduced any further.

Continue Reading

What is an MPH calculator useful for?

The miles per hour measurement is also part of the imperial unit system and it is the standard speed unit to set speed limits in the United States, the United Kingdom and their respective territories. The unit is indistinctly abbreviated as MPH, mph and mi/h.\nThe word mile derives from the Latin word "m?lia," which means "thousand." Romans used the words "mille passus" to refer to the distance of 1,000 paces of two steps each, which is known as the Roman Mile.

Continue Reading

What is a statistical question?

An example of a statistical question might be, "how old are the dogs on your street?" This type of data would need to be collected from all the dog owners on the street, and the data may be subject to some variability.Questions that can be answered with a definitive number are not statistical questions. For example, "how many bricks are in this wall?" is not a statistical question because the number of bricks in the wall can be concisely counted.

Continue Reading

What is a list of odd numbers?

One of the most memorable math lessons from elementary school is learning about even and odd numbers. Identifying even and odd numbers introduces children to the patterns of objects and numbers. The parity of a number is its attribute being even or odd. The numbers 260 and -454 have the same parity because they are both even. In computers "parity bits" are used to determine whether data has been lost or written over when it is moved from one place in storage to another or when transmitted between computers.\nAn even number is any positive or negative number that can be divided exactly by 2. An..

Continue Reading

How can you compare and contrast hurricanes and tornadoes using a Venn diagram?

Venn diagrams are usually drawn as circles that represent the similarities and differences between variables. The extent to which the circles overlap represents how similar or different the objects are. If two circles do not overlap at all, there are no similarities between the variables. If there is a small overlap, then there are only a few similarities; a bigger overlap suggests more similarities.\nTornadoes and hurricanes are similar in that both of them are types of storms with strong winds that cause significant damage. When drawing the Venn diagram, this similarity should be written in ..

Continue Reading

How do you convert 70 mph to kph?

Gather your suppliesUse a calculator as well as a piece of paper and a pencil to calculate how many kilometers per hour are in a single mile per hour.Write the equationWrite 70 x 1.60934400061 on your paper.Use your calculatorMultiply 70 by 1.60934400061 by hitting the appropriate buttons on your calculator. Write the answerDiscover that 70 x 1.60934400061 = 112.65408004302844. Write the answer: 70 mph equals 112.65408004302844 kph.

Continue Reading
Showing 3281 to 3290 of 3956 (396 Pages)