28 terms

ECHS Algebra 1 Test 17

Saxon Math Test after Lesson 90
STUDY
PLAY

Terms in this set (...)

Theoretical Probability
It is the likeliness of an event happening based on all the POSSIBLE outcomes.
Experimental Probability
Based on an experiment written as a ratio comparing the number of times the event occurred to the number of trials.
Standard Form
A polynomial which is written in decreasing order by degree where all like terms have been combined.
Direct Variation
y = kx, Increase (or decrease) in one variable causes a proportional increase (or decrease) in another variable
Inverse Variation
y = k/x, As one quantity increases, the other quantity decreases
Joint Variation
y = kxz, a relationship that occurs when a quantity varies directly with the product of two or more other quantities
Distributive Property
A property indicating a special way in which multiplication is applied to addition of two or more numbers in which each term inside a set of parentheses can be multiplied by a factor outside the parentheses, such as a(b + c) = ab + ac
Commutative Property
The property that states that two or more numbers can be added/multiplied in any order without changing the sum/product.
Associative Property
The property that states changing the grouping of numbers will NOT change the value. For example: (7 + 4) + 8 = 7 + (4 + 8) also works with multiplication
Radical expression
An expression that contains a radical. It must be reduced to simplest terms by prime factorization and then removing appropriately paired factors.
System of Linear Equations
Two or more linear equations for which you can solve for the missing variables.
Compound inequality
Two inequalities that are combined into one statement by the word AND or OR.
Disjunction
A compound statement formed by joining two or more statements with the word OR
Conjunction
A compound statement formed by joining two or more statements with the word AND
Perpendicular Lines
Slopes are opposite reciprocals.
One solution. Consistent/Independent
Parallel Lines
Slopes are the same but y-intercepts must be different. No solution. Inconsistent
Intersecting Lines
Slopes are different.
One solution. Consistent/Independent
Coinciding Lines
Slopes and y-intercepts are the same.
Infinitely many solutions. Consistent/Dependent
Factor an expression
To break an expression down into prime factors.
Types of factoring
GCF - Greatest Common Factor
DOTS - Difference of two squares
PST - Perfect Square trinomial
Grouping - Four or more terms
General - What multiplies to give ac but adds to give b then reduce
Factor the GCF
Greatest Common Factor Ex: 4x - 8 = 4(x - 2)
DOTS
Difference of two squares Ex: x² - 4 = (x + 2) ( x - 2)
PST
Perfect Square Trinomial Ex: x² - 6x + 9 = (x - 3)²
General Factoring
Given an expression in the form ax² + bx + c factor by finding what multiplies to give ac but adds to give b then reduce.
Asymptote
A line that the graph of a function approaches, but never intersects.
Vertical Asymptote
Given an equation in the form of y = a /(x -b) + c it is at x = b
Horizontal Asymptote
Given an equation in the form of y = a /(x -b) + c it is at y = c
Pythagorean Theorem
a² + b² = c²