Tuesday, January 29, 2013

Gcf Solver


Introduction to gcf solver:

The Gcf solver performs to simplification of common fractions and carrying out basic operations. The greatest common divisor (gcd), as well identified as the greatest common factor (gcf), greatest common denominator, or highest common factor (hcf), of two or more non-zero integers, is the largest positive integer that divides the numbers without a remainder. “Greatest Common Factor” short form is gcf. GCF of those numbers is largest factor which commonly divides the given set of numbers (two or more).

Examples Problem for Using Gcf Solver:

Example 1:

Find the gcf of 10, 12, 14 and 16 using gcf solver.

Solution:

The Greatest Common Factor (GCF) of the numbers 10, 12, 14 and 16 is 2.

2 is the greatest number that divides evenly into all of them.

Gcf of this problem is 2.

Example 2:

Find the gcf of 100, 200,300 and 350 using gcf solver.

Solution:

The Greatest Common Factor (GCF) of the numbers 100, 200, 300 and 350 is 50.

50 is the greatest number that divides evenly into all of them.

Gcf of this problem is 50.

Example 3:

Find the Greatest Common Factor (gcf) of 10, 24 and 42.

Solution:

lowest Factors of 10: 1,2,5,10
lowest Factors of  24 : 1, 2,4, 6,8,12,24
lowest Factors of  42  : 1, 2, 3, 6, 7, 14, 21, 42

Common Factors: 1, 2.
1 and 2 divides 10, 24, 42 therefore they are common factors.

Answers for gcf = 1,2.

Understanding help with algebra problems is always challenging for me but thanks to all math help websites to help me out.

Additional Examples for Using Gcf Solver:

Example 4:

Find the gcf of 6/18 using gcf solver.

Solution:

The fraction 6/18 is not reduced to lowest terms. So the lowest term can be reduce to this fraction, the numerator and denominator both are dividing with 6.

6 is the Greatest Common Factor (GCF) of the numbers 6 and 18.
So, this fraction simplified to lowest terms is 1/3.

Gcf of this problem is 6.

Example 5:

Find the gcf of 14/49 using gcf solver.

Solution:

The fraction 14/49 is not reduced to lowest terms. So the lowest term can be reduce to this fraction, the numerator and denominator both are dividing with 7.

7 is the Greatest Common Factor (GCF) of the numbers 14 and 49.
So, this fraction simplified to lowest terms is 2/7.

Gcf of this problem is 7

Monday, January 28, 2013

Stem and Leaf Plots and Histograms Learning


Introduction to Stem and Leaf Plots and Histograms Learning:

Stem and leaf plots and histograms are used to analyze the data. Stem and leaf plots and histograms are used for differnt types of data anlalysis. The Stem and leaf plot is used to analyze large number of data. In Stem and Leaf plots we split the given values into two parts Stem and Leaf. Histograms is a way of representing the data in a graphical form like a bar chart method. Histograms are widely used in statistics for representing frequency distribution. I like to share this Statistics Math with you all through my article.

We will learn the stem and leaf plot and histograms using examples.

Sample Problem for Stem and Leaf Plots and Histograms Learning:

Learning Stem and Leaf plots:

In stem and leaf plot, the Stem is the first value and the number and the leaves is the last digit. If we have other than one value we will use back to back Stem and Leaf method. We are indicating the group scores by Stem and the Leaf will indicate the entity scores. The leaf values will go to the right element of the Stem.

problem 1:

Place all the values in a Stem and Leaf plot of the table

00 10 15 20 25 30 35 40 50 60 70 80 90

Solution:

We know the first digit is stem and the last digit is leaf values are the table

Stem                                 leaf

0                                        1

1                                        0                5

2                                       0                5

3                                       0                5

4                                       0

5                                        0

6                                        0

7                                        0

8                                         0

9                                         0

From the above data’s we have 20 and 25 so the stem 2 has two leaves. The same for 3 and 4 both are having two leaves in the table. Using these stem and Leaf plots chart we can find the statistical data mean median and mode easily by using of above table value. Please express your views of this topic Ratio Formula by commenting on blog.

Learning Histograms:

problem 2:

Histogram is one of the bar chart methods. From this we call identify the frequency distribution of the data’s. In this the height of the bars will indicate the observed frequencies. We have to convert the histogram frequency distribution into probability distribution by dividing the tally of each group. In histogram the bars are not adjacent it means that there is no space between them. We can calculate the mean median and mode from the graph.

Wednesday, January 23, 2013

Definition of a Math H Word


Learning definition of a math h word:

There are many math words beginning with the letter h. Some words are Height, Heptagon, Hexagon, Hypotenuse, Hyperbola, Hypothesis, Higher derivative, Harmonic mean, Harmonic progression, Harmonic sequence, Harmonic series, Hero’s formula, Hexahedron, Homogenous system of equations, Hole, Horizontal, Horizontal shift, Horizontal Parabola, Horizontal Line equation, Horizontal line test. Horizontal reflection, Horizontal shrink, Hyperbolic trigonometry, High quartile, HL congruence, Half life, Half angle identities,  Half closed interval, half open interval, hexahedron, and so on …

In this article let us see some definitions of the math terms beginning with the letter h.

Learning Definition of a Math H Word Harmonic Mean:

Harmonic mean: If n values of data are given we could find the harmonic mean of those n values by following the below steps.

Take the reciprocal of all the numbers in the given data
Add them.
Divide the sum with the number of data.
Take the reciprocal to get the harmonic mean

Learning Definition of a Math H Word Height:

Height: Height is defined as the shortest distance between points on the base to the top of the figure. The top of the figure can be a vertex or apex or any base. Understanding Exponential Formula is always challenging for me but thanks to all math help websites to help me out.

Learning Definition of a Math H Word Hero's Formula:

Hero’s formula: Triangles whose all sides are different are called as scalene triangle. Let the sides of the scalene triangle be a, b, c. Area of a scalene triangle can be determined using hero’s formula. Area = `sqrt(s(s-a)(s-b)(s-c))`

Where s =`(a + b + c)/(2)`  and s is called as semi perimeter of the triangle.

Hexagon: Hexagon is a closed polygon with six sides. If all the sides of the hexagon are equal then it is called as regular hexagon. Otherwise, it is called as Irregular hexagon. Angle in a regular hexagon is 120 degrees.

Monday, January 21, 2013

Trigonometry Half Angle Formulas


Introduction to Trigonometry Half Angle Formulas:

In this topic trigonometry half angle formulas, trigonometry half angle formulas for trigonometry functions are derived from the sum of angles formulas. Sine, Cosine and Tangent are the trigonometry functions involved in trigonometry half angle formulas. Trigonometry half angle formulas are as follows, Having problem with Angle Sum Identity keep reading my upcoming posts, i will try to help you.

Sin`(theta/2)=+-sqrt((1-costheta)/2)`,

Cos`(theta/2)=+-sqrt((1+costheta)/2)`,

Tan`(theta/2)=+-(1-costheta)/sintheta`.

Let us see about trigonometry half angle formulas

Proving Trigonometry Sine Half Angle Formulas:
To Prove: Sin`(theta/2)=+-sqrt((1-costheta)/2)`.

Proof: We know that, cos2A = 1 − 2sin2A.

=> cos2A − 1 = −2sin2A,

=> 2sin2A = 1 − cos2A,

=> sin2A = `(1-cos2A)/2`,

Taking square root on both sides, we get,

=> sinA = `+-sqrt((1-cos2A)/2)`,

Now plug A = `theta/2` in the above equation, we get,

=> Sin`(theta/2)=+-sqrt((1-costheta)/2)`,

Hence proved that, Sin`(theta/2)=+-sqrt((1-costheta)/2)`,

Proving Trigonometry Cosine Half Angle Formulas:

To Prove: Cos`(theta/2)=+-sqrt((1+costheta)/2)`.

Proof: We know that, cos2A = 2cos2A − 1,

=> cos2A + 1 = 2cos2A,

=> cos2A = `(1+cos2A)/2` ,

Taking square root on both sides, we get,

=> cosA = `+-sqrt((1+cos2A)/2)`,

Now plug A = `theta/2` in the above equation, we get,

=> Cos`(theta/2)=+-sqrt((1+costheta)/2)`.

Hence proved that, Cos`(theta/2)=+-sqrt((1+costheta)/2)`. I have recently faced lot of problem while learning Changing Radians to Degrees, But thank to online resources of math which helped me to learn myself easily on net.

Proving Trigonometry Tangent Half Angle Formulas:

To Prove: Tan`(theta/2)=+-(1-costheta)/sintheta`.

Proof: We know that,`tantheta=sintheta/costheta`,

=>`tan(theta/2)=sin(theta/2)/cos(theta/2)`,

=>`tan(theta/2)=+-(sqrt((1-costheta)/2))/(sqrt((1+costheta)/2))`,

=>`tan(theta/2)=+-sqrt((1-costheta)/(1+costheta))`,

Taking conjugate, we get,

=>`tan(theta/2)=+-sqrt((1-costheta)/(1+costheta)xx(1-costheta)/(1-costheta))`,

=>`tan(theta/2)=+-sqrt((1-costheta)^2/(1-cos^2theta))`,

=>`tan(theta/2)=+-sqrt((1-costheta)^2/(sin^2theta))`,

=>`tan(theta/2)=+-(1-costheta)/sintheta`.

Hence proved that, `tan(theta/2)=+-(1-costheta)/sintheta`.

Saturday, January 19, 2013

Speed Scalar or Vector


Introduction to speed scalar or vector

A physical quantity can be classified into two categories – scalar and vector. A scalar quantity is one which can be completely defined by its magnitude alone. For example, physical quantities such as temperature and distance are scalar. On the other hand, vector quantities are those which can be completely defined only if both the magnitude and direction are defined. Some examples of vector quantities include displacement, acceleration etc. With this basic understanding, let us now understand whether speed is a scalar or vector. Interestingly, many times we use the terms ‘speed’ and ‘velocity’ interchangeably. However, when we start thinking in terms of concepts of scalars and vectors, we realize there is an important distinction between speed and velocity. Understanding Multivariable Chain Rule is always challenging for me but thanks to all math help websites to help me out.

Speed is a Scalar Quantity:

Speed is the rate at which a body moves. In can be measured as distance travelled per unit time and can be expressed in units such as miles/hour, miles/sec etc. To express the speed of a body completely we need not mention the direction in which the body is moving. As compared to this, velocity is defined as the rate at which a body moves in a particular direction. Hence, it may be alright to make a statement such as:

The bird is flying at a speed of 2 miles / hour.
However, to express velocity we need to express a statement such as:

The ball is moving at a velocity of 2 miles / hour in the direction of 30 degrees East of North from the origin.
Since, speed can be expressed completely by its magnitude alone, it is a scalar quantity. Is this topic Quadrilateral Definition hard for you? Watch out for my coming posts.

Examples of Scalar and Vector:

The difference between speed and velocity is better understood by considering the example of a ball moving at a constant speed in a circular path. For a body moving in a circular path, the direction is continuously changing. Since speed is a scalar quantity, it is possible to have a body moving in a circular path at a constant speed. However, since velocity is not a scalar, it changes when the direction changes (even if magnitude remains constant). Hence, for a body moving at constant speed in a circular path, the velocity is continuously changing!

Tuesday, January 15, 2013

Mean Value Theorem Practice Problems


Introduction to mean value theorem practice problems:

Let f: [a,b] -> R be a continuous function on [a,b] and differentiable on (a, b). Then the Mean value theorems states that there exists some c in (a,b) such that

f '(c) = [f(b) - f(a)] / (b-a)

This is the one of the most fundamental theorem and result in Calculus. The geometrical interpretation of the mean value theorem is that the slope of tangent drawn at (c, f(c)) is same as the slope of the secant between (a, f(a)) and (b, f(b)). In other words , there is a point c in (a,b) such that the tangent at (c,f(c)) is parallel to the secant between (a,f(a)) and (b,f(b)).

Here are some of the mean value theorem practice problems.

Mean Value Theorem Practice Problem and its Solution.

Problem: Verify Mean value theorem for the function f(x) = x2 in the interval [2,4].

Solution: The function f(x) = x2 is continuous in [2,4] and differentiable in (2,4) as its derivative f '(x) = 2x is defined in (2,4).

Now f(2) = 4 and f(4) = 16. Hence

[f(b) - f(a)] / (b-a) = (16-4)/(4-2) = 6

Mean value theorem states that there is a point c belongs to (2,4) such that f '(c) = 6. But f '(x) = 2x which implies c= 3 and this belongs to (2,4), therefore f '(c) =6. Between, if you have problem on these topics Decimal Notation, please browse expert math related websites for more help on Discount Formula.

Practice Problems-mean Value Theorem :

Problem: Verify Mean Value Theorem, if f(x) = x2-4x -3 in the interval [a,b], where a=1 and b=4.

Problem: Examine the applicability of Mean value theorem for the function f(x) = x2 - 1 for x belonging to [1,2].

Problem: Verify Mean Value Theorem, if f(x) = x3-5x2 -3x in the interval [a,b], where a=1 and b=3. Find all c belonging to (1,3) for which f '(c) =0.

Problem: Verify the Mean Value Theorem for the function f(x) = x2 +2x -8 for x belonging to [-4,2].

Problem: Verify the Mean Value Theorem for the function f(x) = (x-4) (x-6) (x-8) in [4,10].

Problem: Prove the Mean Value Theorem for the function f(x) = 1/x for the interval [-1, 1].

Problem: Examine if the Mean value theorem is applicable or not to the function f(x) = [x] for x belonging to [5,9] where [x] represent the greatest integer function.

Thursday, January 10, 2013

Double Vertical Line


Introduction to double vertical line:

Double vertical lien mean two vertical lines are in the same plane. These two vertical lines are parallel to each other. Normally we know slope of the vertical line is undefined. So double vertical line mean the slope of the both line is undefined. We know the slope is equal for parallel lines. So the double vertical lines are parallel and undefined slope lines. We will see some example problems for double vertical lines.

Example Problems for Double Vertical Line:

Normally vertical line means the line which is perpendicular to x – axis. When we draw the double vertical line we get two lines. Both are perpendicular to x – axis.

Double vertical line – example 1:

Draw the following lines and say whether these lines are parallel  or perpendicular? The equation of the lines are x = -1 and x = 2.

Solution:

Given equation of the lines are x = -1 and x = 2.

From the equation we know the slopes of the lines are undefined.

We know if the slopes of any two lines are equal we can say that is parallel to each other. So these lines are parallel lines. I have recently faced lot of problem while learning Geometry Calculator, But thank to online resources of math which helped me to learn myself easily on net.

If we draw these lines on the graph it will be like this.


More Examples for Double Vertical Line:

Double vertical line – example 2:

Draw the following lines and say whether these lines are parallel or perpendicular? The equation of the lines are x = 3 and x = -2.

Solution:

Given equation of the lines are x = 3 and x = -2.

From the equation we know the slopes of the lines are undefined.

We know if the slopes of any two lines are equal we can say that is parallel to each other. So these lines are parallel lines.

If we draw these lines on the graph it will be like this.


From the above we learn about the double vertical line. These are some of the example problems for double vertical line.

Tuesday, January 8, 2013

Types of Sets


Null set: A st which has no element in it or which is empty. This st is denoted by phi (φ). The number of members in this st is zero because it does not have any member in it. So, its cardinality = 0.
Example: st of integers whose value is fractional.
Singleton set: A st which has only one element or single element is known as singleton element. Its cardinality is 1.
Example:
Finite set: a st which has finite number of elements in it.

Example: a st of all months in a year is finite st.
Infinite set: a set type which has infinite number of elements is infinite det. It is further classified as countable and uncountable.
For example a st or integers is countable infinite st. A st of real numbers is uncountable infinite st.
Subset of a st: a st is called as subset of another st if all its elements are also in second st. Symbol used for subset is . AB implies that A is subset of B and all elements of A are also present in st B. Also B is said to be super st of A. All sts are subst of their own. A null st is subset of all sts. Understanding Number of Subsets is always challenging for me but thanks to all math help websites to help me out.

Proper subset: If there exist at least one extra element in the superset which is not present in subset then the subset is proper subset. For example if st A = {1, 2, 3, 4} and B = {1, 2, 3, 4, 5, 6, 7} then A is proper subset of B represented as: A B.
Equal sts: two sts are said to be equal if both are subset of each other means if for sts A and B, AB and BA then A=B.Please express your views of this topic Arithmetic Mean Definition by commenting on blog.

Set Difference: st diff A –B gives a st which includes those elements of A which are not in B.
Example: A = {2,5,7,8} and B = {2,7,9,10} then A – B = {5,8}
Disjoint set: if two sts do not have common element then they are disjoint sts.
For example: A = {a, b, f, g} B = {e, r, t, y} then A and B are disjoint as AB = φ.
Power set it is the st of all the possible sub-sts of a given st. Its cardinality or number of elements is: 2n, where n is number of elements of given st.
Example: if A = {a, s, d} then P(A) = {φ, {a}, {s}, {d}, {a,s}, {s,d}, {a,d}, {a, s, d}}.

Friday, January 4, 2013

Relative Frequency Table


Introduction to Relative Frequency Table

A Frequency is the total number of times a given data present in a data set. A Relative frequency table is the division of times a solution occurs. To calculate relative frequencies, split each frequency by entire number of data in a data set. In Relative frequencies, we can represent solution as fractions, percents, or decimals. A relative frequency table shows the total number for each group and the relative frequency or percentage of time in which each group occurs.



Explanation of Relative Frequency Table

The relative frequency table is used to present how the data can be spread. When the frequencies are represented in columns, then the graph that was plotted is called a histogram.

Frequency distributions can illustrate also the definite number of observations falling in each of the percentage of observations. In the last case, this distribution is referred as a relative frequency distribution

Relative frequency table depends on grouping of data divided into mutually exclusive classes and the number of occurrences in a class. Managing and operating on relative frequency table data is much easier than process on raw data.

Relative frequencies Table can be provided with Frequency Distributions are histograms, pie charts, bar charts, and line graphs. A Histogram that represent the frequency by means of four-sided figure in which the class intervals represented by width of a four-sided figure and frequencies are directly proportional to area of the rectangle. Is this topic help solving linear equations hard for you? Watch out for my coming posts.

While constructing the relative frequency table, we have to note down three important points.

How many classes or intervals do you want? This also identifies the class width.

Where does the first interval of the relative frequency table start?

How can avoid boundary upheld?

Example Problem for Relative Frequency Table

Find the Relative frequency table from the given frequency table.

DATA    FREQUENCY
2    2
3    5
4    12
5    10
6    3

Solution:

To find the Relative frequency

Step1:

Add all the frequency values:

= 2+5+12+10+3

= 32

Step2:

Relative Frequency = Frequency value / Sum of total number of Frequency

Therefore, the Relative frequency table is,

DATA    FREQUENCY    RELATIVE FREQUENCY
2    2    2/32 or 0.06
3    5    5/32 or 0.15
4    12    12/32 or 0.37
5    10    10/32 or 0.31
6    3    3/32 or 0.93

So, the sum of relative frequency = 2/32 + 5/32 + 12/32 + 10/32 + 3/32

= 32/32

= 1

Tuesday, January 1, 2013

Rules for Change of Pronouns in Narration


Narration is a major concept in English grammar learning. There are many rules that need to be followed while doing narration i.e. while changing from direct speech to indirect speech. Let’s have a look at the rules for changing pronouns in narration.
Before, knowing the rules of changing pronouns in narration, let’s identify the different types of pronouns.
First Person: I, my, me, we, our, us.
Second Person: You, your.
Third Person: He, she, they, them, their.
Pronouns are changed as a rule that is popularly termed as SON; here, S stands for Subject, O for Object and N for No Change.
Rule 1: First Person is changed in the indirect speech according the subject of the reporting verb in the direct speech. For example:
Direct Speech: She says, “I love Winnie the Pooh.”
Indirect Speech:  She says that she loves Winnie the Pooh.

Direct Speech: I say, “I am an honest person.”
Indirect Speech: I say that I am an honest person.
Rule 2: Second Person is changed in the indirect speech according to the object of the reporting verb in the direct speech. For example:
Direct Speech: She says to me, “You have bought good fun toys from Bburago India collection.”
Indirect Speech: She tells me that I have bought good fun toys from Bburago India collection.

Direct Speech: I say to them, “You have shopped from Mothercare online India collection.”
Indirect Speech: I said to them that they have shopped from Mothercare online India collection.

Direct Speech: She says to her, “You have completed your work.”
Indirect Speech: She tells her that she has completed her work.
Rule 3: Third Person is not changed in the indirect speech. For example:
Direct Speech: He says, “He loves shopping online.”
Indirect Speech: He says that he loves shopping online.

Direct Speech: Everybody says, “They want peace in the world.”
Indirect Speech: Everybody says that they want peace in the world.
These are the rules of narration that is used in terms of changing pronouns in English grammar.