Ch.2 Flashcards
(28 cards)
Percent
Comparison of a number to 100
Ex:15percent=15 per 100=15/100=15%
Similar (figures)
Exact shape but not same size
Commission
Money paid to a person/company for making a sale
Interest-2 answers
Amount of money charged for borrowing money, or amount of money earned when saving or investing money
Principal
Amount borrowed or invested. Simple interest is interest only on principal
Tip
Amount of money added to a bill
Sales tax-equation
Percent x cost= sales tax
Percent change
Increase/decrease given as a percent of original amount
Percent increase
Describes amount that’s grown
Percent decrease
Describes amount that’s been reduced
Discount
% of original price
Final price= original price - discount
Markup
% of whole cost
Final price= wholesale cost + markup
Equation
Mathematical statement that 2 expressions are equal
Solution of an equation
A value of the variable that makes the equation true
Identity
An equation that is true for all values of the variable
Contradiction
An equation that is not true for any value of the variable
Formula
An equation that states a rule for a relationship among quantities
Literal equation
An equation with 2 or more variables
Ratio
a comparison of 2 quantities by division
Porportion
a statement that 2 ratios are equivalent
rate
a ratio of 2 quantities with different units
32mi/8gal
Unit rate
a rate with a 2nd quantity of 1 unit
Ex: 17mi/1gal
Conversion factor
a rate in which the 2 quantities are equal but use different units
Ex: 12in/1ft
Cross products
in the proportion a/b=c/d, the products a x d and c x b are called cross products
