MATH~ ALGEBRA 1
percentile
A point on the distributionbelow with a certain % of scores fall. Ex: Scored in the 99th percentile = only 1% scored higher than you
subtraction property of equality
If you subtract the same number from each side of an equation, the two sides remain equal.
weighted average
Method to assign inventory cost to sales; the cost of available-for-sale units is divided by the number of units available to determine per unit cost prior to each sale that is then multiplied by the units sold to yield the cost of that sale., Wtd Avg. = (weight)(data point) + (weight)(data point) / sum of weight
percent of decrease
The percent of change found when the original amount decreases
metric
a rule for assigning a number to some characteristic or attribute
formula
a rule for relationships between certain quantities
multiplication property of equality
each side is multiplied by the nonzero number
identities
equations that are true for all values
equivalent equations
equations that have the same solution
extremes
first & last terms
rate
having different units of measure
unit rate
how many are being compared
unit analysis
including units for each quantity in a calculation to determine the unit of the answer
consecutive integers
integers in counting order
algebra tiles
manipulative that represent a constant or variable
means
middle terms of the proportion
debt-to-income
ratio used by mortgage lenders compares the total monthly debt, to total income. the figure should not exceed 36- is calculated by as/by
rate problems
set up like ratios; cross-multiply; solve for x
percent of change
the percent a quantity increases or decreases from its original amount
percent of increase
the percent of change when the new amount is more than the original amount
solve an equation
the process of finding all values of the variable that make the equation a true statement
scale
the relationship being measured
number theory
the study of number's and the relationship between them
deciles
type of percentile band, divides scores into tenths or 10 equal units
dimensional analysis
A method of using conversion factors and unit canceling to solve a unit conversion problem.
scale model
A model of an object in which the dimensions are in proportion to the actual dimensions of the object.
uniform motion problems
Another type of problem commonly solved using weighted averages; problems where an object moves at a certain speed, or rate; use the formula d= rt to solve them.
mixture problems
Types of problems commonly solved using weighted averages; two or more parts are combined into a whole.
ratio
a comparison of two number's by division
proportion
an equation stating that two ratios are equal
literal equation
an equation that contains two or more variables, An equation in which letters are used to replace the coefficients and constants of another equation.
multi-step equation
an equation that requires more than one step