Ch 2 vocab

Question 0

solution of an equation

Answer 0

a value of the variable that makes the equation equal

Question 1

Equation

Answer 1

A mathematical statement that two expressions are equal

Question 2

formula

Answer 2

an equation that states a rule for a relationship among quantities

Question 3

literal equation

Answer 3

an equation with two or more variables; use inverse operations

Question 4

ratio

Answer 4

a comparison of two quantities by division

Question 5

proportion

Answer 5

a statement that two ratios are equivalent

Question 6

rate

Answer 6

a ratio of two quantities with different values

Question 7

unit rate

Answer 7

a rate with a second quantity of 1 unit

Question 8

conversion factor

Answer 8

a rate in which two quantities are equal but use different units

Question 9

cross products

Answer 9

use to solve proportions

Question 10

scale

Answer 10

a ratio between two sets of measurements

Question 11

scale drawing/scale model

Answer 11

uses a scale to represent an object as smaller of larger than the actual object

Question 12

similar figures

Answer 12

have exactly the same shape but not necessarily the same size

Question 13

corresponding sides

Answer 13

sides of two figures in the same relative position

Question 14

corresponding angles

Answer 14

angles in the same relative position

Question 15

indirect measurement

Answer 15

used to solve a proportion involving similar triangles to find the length that is nor easily measured

Question 16

scale factor

Answer 16

the multiplier used with the dimensions of a figure to find a similar figure

Question 17

percent

Answer 17

a ratio that compares a number to 100

Question 18

commission

Answer 18

money paid to a person or a company for making a sale

Question 19

interest

Answer 19

the amount of money charged for borrowing money, or the amount of money earned when saving or investing money

Question 20

principal

Answer 20

the amount borrowed or invested

Question 21

tip

Answer 21

an amount of money added to a bill for service

Question 22

sales tax

Answer 22

a percent of an item’s cost

Question 23

percent change

Answer 23

an increase or decrease given as a percent of the original amount

Question 24

percent increase

Answer 24

describes an amount that has grown

Question 25

percent decrease

Answer 25

describes an amount that has been reduced

Question 26

discount

Answer 26

an amount by which an original price is reduced

Question 27

markup

Answer 27

an amount by which a wholesale cost is increased

Question 28

identity

Answer 28

an equation that is true for all values of the variable

Question 29

contradiction

Answer 29

an equation that is not true for any value of the variable; has no solutions