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Category: SAT Math
Ratio, Proportion and Rate-Lecture-15
A rate is a ratio that compares two different kinds of numbers, such as miles per hour or dollars per pound. A unit rate compares a quantity to its unit of measure. Ratio Proportion and Rate
Percentage- Lecture-13
a percentage is a number or ratio that represents a fraction of 100. It is often denoted by the symbol “%” . Also When we say “Percent” we are really saying “per 100”. One percent (1%) means 1 per 100. Hence Use the percentage formula: P% * X = Y. Percentage
Graph in XY plane-Lecture-10
Coordinate system is a pair of perpendicular coordinate lines. Lines are called coordinate axes. Also the point where both interest is origin. Therefore point (x,y) is location on XY-plane. Graph in XY-Plane
Linear functions-Lecture 12
Two variable linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y. Linear functions
Graphic linear system-Lecture-11
Linear system can be solve by graphing. A linear system that has exactly one solution. Hence it intersect at x- axis once. Graphing linear system
Algebraic Inequality-Lecture-9
An algebraic equality is when we have two statements and then say that they are equal. Algebraic Inequality
Algebraic Absolute Inequality-Lecture-8
The solution to an absolute-value inequality is to be intervals. Also we can say solution of inequality is range of values. Hence on graph it represent by area . Algebraic absolute inequality
Heart of Algebra
Algebra is a branch of mathematics dealing with symbols and the rules. Therefore we can say equation is relationships between variables. Algebra
System of equation-Lecture-7
A “system” of equations is a set or collection of equations that you deal with all together at once. Linear equations (ones that graph as straight lines) are simpler than non-linear equations, and the simplest linear system is one with two equations and two variables. System of equation
