Math

Refine Search

What is 2/3 as a decimal?

To convert a fraction into decimal format, the denominator should be changed to 10. In the above example, the denominator is three. To change it to ten, it is multiplied by 3.333 when rounded to three decimal places. To change 2/3 into a decimal, first multiply two and three by 3.333. Three multiplied by 3.333 is equal to 10, and two multiplied by 3.333 is equal to 6.667 when rounded to three decimals. Thus, the fraction becomes 6.667/10. Dividing 6.667 by 10 yields 0.667.

Continue Reading

How is geometry used in everyday life?

The measurements for the area and perimeter of a floor are necessary for carpet and tile installation both in rectangular and irregularly-shaped rooms. They also assist interior designers with creating floor plans and choosing the correct size of furniture, tables and rugs. Outdoor projects make use of geometry as well. A gardener may calculate the number of cubic feet of soil needed to sustain plants or to fill a raised bed. In this case, the correct equation would be base x height x width. The formula for finding a perimeter may be used to determine how much wood to purchase for building a f..

Continue Reading

What is one half of two-thirds?

Another method one can use to arrive at this answer is division. One can divide the dividend, two-thirds, by two, the divisor. However, one needs to use the reciprocal of two, which is one-half when performing a division of fractions. The divisor needs to be changed into its reciprocal number. One can then multiply the two fractions of one-half and two-thirds.Fractions have numerators, the top numbers, and denominators, the bottom numbers. After performing either a division or multiplication of fractions, one may need to reduce or simplify the fraction into lowest terms.

Continue Reading

Are the Harcourt math answer keys available online?

The HMH “Go Math!” series of titles offers premium classroom packages that include both print and digital materials. These packages provide a teacher subscription to the Digital Teacher Management Center that allows teachers to print customized answer keys. Customers need an institutional account to order math texts, including the premium classroom packages, from HMH and to gain access to the online solutions.

Continue Reading

What is 20 percent of $80?

To calculate a percentage of a number, the percentage should first be converted to a decimal. To do that, the decimal is moved over two spaces to the left. For example, 55 percent is equal to .55. Then the decimal is multiplied by the number to find the answer. When trying to find 20 percent of any number, there is a shortcut method that doubles the original number and then moves the decimal point over one place. Therefore, 80 times 2 equals 160. Moving the decimal one place produces 16. Thus, 20 percent of an $80 check would be $16.

Continue Reading

What does the "distance between two points" mean?

The formula for finding the distance between two points in Euclidean geometry, a? + b? = c?, is the same formula that is used to find the length of the hypotenuse of a right triangle. In a three-dimensional plane, the distance between two points must take in the change in the x, y and z coordinates.

Continue Reading

What is the answer to 18 x 5?

The multiplication function is defined as the sum of one number when added to itself the amount of times indicated by the second number. For example, in 18 x 5, the solution can be found by adding together the number 18 a total of five times, as in 18 + 18 + 18 + 18 + 18, which equals 90. The function can similarly be solved by adding the number five to itself 18 times, resulting in the same answer of 90.

Continue Reading

What is a Roman numeral conversion chart?

The Roman counting system uses combinations of seven letters, I, V, X, L, C, D and M, to represent all numbers. These are equal to 1, 5, 10, 50, 100, 500 and 1,000. When a smaller number is placed in front of a larger number, this indicates a subtraction; the Roman numeral IX, for example, is equal to 10 minus 1, or 9. Conversely, a larger number in front of a smaller number is additive; the number XI is equivalent to 10 plus 1, or 11.

Continue Reading

What are facts about the number "14"?

Atomic numbers are associated with the number of protons found in a particular element, which is why silicon's atomic number is 14; it has 14 protons. No other elements possess this atomic number because no other elements have the same amount of protons as silicon.\nValentine's Day is an international holiday occurring on Feb. 14. It is named after Saint Valentine who is recorded as dying in the year 269 CE on that day. The modern holiday is a day about love, affection and the symbolism of the heart. One custom prevalent in the United States is the exchange of valentines, tokens mean..

Continue Reading

Does a circle have rotational symmetry?

An equilateral triangle and a square are other examples of shapes with rotational symmetry. An equilateral triangle maintains its symmetry when rotated 120 or 240 degrees, while a square is identical when rotated 90, 180 and 270 degrees. However, of the letters "C," "R," "H" and "A," only "H" is rotationally symmetrical, as it may be rotated 180 degrees and look identical, while the others are visibly different with even the slightest rotation.

Continue Reading
Showing 1671 to 1680 of 3956 (396 Pages)