Math

Refine Search

How do you subtract mixed numbers?

Convert all mixed numbers to fractionsTo do this, multiply the denominator by the whole number, then add the numerator. This yields the new numerator. Use the original denominator. For example, if you have the mixed number 1 7/8, it is rewritten as 15/8.Rewrite all fractions to use the same denominatorWith the fraction 15/8, also assume you're subtracting 2 3/4 from this number. Converting it yields 11/4. Eight is the least common multiple of 4 and 8, so you only have to multiply the fraction by 2. This yields 22/8. The denominator does not matter if it's the same.Subtract the numera..

Continue Reading

What are some real-life examples of parabolas?

Projectile motion is the name of the parabolic function used for objects such as baseballs, arrows, bullets and missiles. It predicts the path of any object with both a horizontal force and a vertical force due to gravity, according to Math is Fun.\nFinancial experts use parabolas to maximize profits. These functions compare the number of items sold with the price of each, allowing the retailer to know the ideal price to set.\nThe cables and arches that support bridges often follow the shape of a parabola. This allows the engineer to maximize the weight supported while minimizing the materials..

Continue Reading

How does a graph help people interpret scientific data?

Several types of graphs exist. A pie chart is used to compare the different ratios of parts to a whole. However, these are not often used in their default state because it is difficult to compare quantities based on a visual angle as opposed to the length of a bar.\nBar charts can compare two sets of data, such as the effectiveness of an experimental medicine versus a placebo. Bar charts are used to compare a single snapshot in time typically, but they can be used to denote different periods.\nLine charts are mostly used to show a changing trend, such as animal migrations or populations in a g..

Continue Reading

What is the purple math solver?

Some examples offered at the site include 2/3 = x/3, where x = 2, because the denominators are equal. Steps for (x-1)/15 = 2/5 are: The expression is converted to a common denominator of 15, such that (x-1)15 = (2/5) x (3/3); (x-1)/15 = 6/15. Comparing the numerators, x-1 = 6, so x = 7.\nQuadratic equations of the form (a - b) (a + B) are solved through taking the square root, the quadratic formula and completing the square.

Continue Reading

What is the divisibility rule for 9?

Consider the example of 7425 where the sum of its digits is equal to 18. Since 18 is divisible by 9, 7425 is divisible by 9. The number 7425 is also divisible by 3. However, the reverse is not necessarily true. For instance, the number 33 is divisible by 3 but it is not divisible by 9. The divisibility rule on sum of digits does not work for higher powers of 3. For instance, the sum of the digits of 7425 is 18 but 7425 is not divisible by 18.

Continue Reading

How do you calculate percents?

Fifty percent refers to 50 per 100. It means that 50 percent or one-half of something is being referenced. One hundred percent refers to all of something.\nAn example of calculating percent is seen through finding 25 percent of the number 80. Twenty-five percent is converted to a number by dividing 25 by 100, written as a fraction as 25/100 or as 0.25 as a decimal. This is then multiplied by 80, providing an end result of 20.

Continue Reading

How do I graph logarithmic functions?

For the simplest logarithmic functions, the logs are not defined when x=0 or x is negative. So the domain for such a log equation is restricted to only positive values for x. An equation such as y=log(x+3) would be defined for x values that are greater than -3. Once the domain is determined, y values can be calculated using the x values to determine the range of the function. The asymptote is calculated to determine the values where the y values change exponentially for small increases in x. For y=log x, the asymptote is the line x=0. Therefore, additional values of x should be used between 0 ..

Continue Reading

How are matrices used in everyday life?

Data that can be organized in rows and columns can be represented as a matrix. In computer science, matrices are used in the projection of three dimensional images into two dimensional screens. Scholastic matrices are used by page rank algorithms. Cryptography is also implemented using matrices.In physics, matrices are applied in optics, quantum mechanics and electrical circuits. Matrices can also be used to represent real-world data like the traits or habits of a population. Matrices are also applied in economics to study stock market trends and to optimize profit and minimize loss, in chemis..

Continue Reading

How do you subtract negative numbers?

Verify signsThe number should be preceded by a minus/negative sign (-). Positive numbers do not have a sign.Check operatorThe operator has to be a minus symbol (-) between the number values.Complete the calculationThe operator and sign of the second number then become positive. For example, -3 - (-3) = -3 + 3 = 0 and 3 - (-3) = 3 + 3 = 6.

Continue Reading

What is binary subtraction?

Something called the "two's complement" of the number that is subtracted has to be calculated first in order to compute a binary subtraction. The two's complement is obtained by replacing the ones with zeros and the zeros with ones in the given binary number. Following the rules of binary addition, one should then add one to the new number to find the two's complement. It is only after doing this that the binary subtraction can be computed the same way as decimal numbers.

Continue Reading
Showing 2351 to 2360 of 3956 (396 Pages)