## Months

There are twelve months in a year: Months in Detail Here are the twelve months in detail: Month Order Month Name 3 Letters Format Days in Month 1 January Jan 31 2 February Feb 28 (29 in leap years) 3 March Mar 31 4 April Apr 30 5 May May 31 6 June Jun 30 … Continue reading "Months"

Read More## Permutations and Combinations

Definitions a Combination is when the order doesn’t matter. a Permutation is When the order does matter. In other words: A Permutation is an ordered Combination. Permutations There are 2 types of permutation: Permutation with Repetition: such as the lock. It could be “444”. Permutation without Repetition: for example the first three people in a … Continue reading "Permutations and Combinations"

Read More## Solving Systems of Linear Equations Using Matrices

Example Solve x + y + z = 6 2y + 5z = −4 2x + 5y − z = 27 Change into matrix form AX = B where A is the 3×3 matrix of x, y, z coefficients X is x, y, z B is 27, 6, −4 Then find the value of x, y, z X = … Continue reading "Solving Systems of Linear Equations Using Matrices"

Read More## Solving SAS Triangles

SAS (Side, Angle, Side) is when we know 2 sides and the angle between them. How to solve an SAS triangle ? use the Law of Cosines to calculate the unknown side, use the Law of Sines to find the smaller of the other two angles, use the three angles add to 180° to find … Continue reading "Solving SAS Triangles"

Read More## Inverse Functions

Definition The inverse is shown by putting a little “-1” after the function name, like this: f-1(y), where y = f(x) It says “f inverse of y“ Here we have the function f(x) = 3x+2 The flow is Inverse Functions make 3x + 2 back to x , substitute y = 3x + 2, then So, … Continue reading "Inverse Functions"

Read More## Lines of Symmetry of Plane Shapes

The line of symmetry is the axis or imaginary line that passes through the center of the shape or object and divides it into identical halves. How to find a shape has a Line of Symmetry ? You can find a shape has a Line of Symmetry or not by folding it When the folded … Continue reading "Lines of Symmetry of Plane Shapes"

Read More## Function Transformations

How move and resize the graphs of functions? How move the graphs of functions? Add a constant to the y-value will move it up or down Add a constant to the x-value will move it left or right Examples Function c > 0 c < 0 f(x) = x2 g(x) = x2 + c f(x) … Continue reading "Function Transformations"

Read More## Stem and Leaf Plots

Definition A Stem and Leaf Plot is a special table where each data value is split into a “stem” (the first digit or digits) and a “leaf” (usually the last digit). See this example: Example “47” is split into “4” (stem) and “7” (leaf). 10, 11, 22, 23, 24, 35, 36, 47, 48, 49 Stem … Continue reading "Stem and Leaf Plots"

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