Chapter one (Alg 2)

Question 1

Rational numbers

Answer 1

can be written as the ratios of integers, can be written as decimals that terminate or repeat

Question 2

irrational numbers

Answer 2

cannot be written as the ratios of integers, cannot be written as decimals that terminate or repeat

Question 3

Graph

Answer 3

point on a number line that corresponds to a real number

Question 4

Coordinate

Answer 4

number that corresponds to a point on a number line

Question 5

Opposite or additive inverse

Answer 5

The opposite of any number a is -a

Question 6

Reciprocal or multiplicative inverse

Answer 6

any nonzero number a is 1/a.

Question 7

Properties of Addition and Multiplication (Addition)

Answer 7

Commutative a + b = b +a
Associative (a+b) + c = a + (b +c)
Identity a + 0 = a , 0 + a = a
Inverse a + (-a) = 0
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Subtraction is defined as adding the opposite

Question 8

Properties of Addition and Multiplication (Multiplication)

Answer 8

Commutative ab = ba
Associative (ab) c = a (bc)
Identity a * 1 = a , 1 * a = a 
Inverse a * 1/a = a , a does not equal 0
{}
Division is defined as multiplying by the reciprocal.

Question 9

Exponent

Answer 9

tells the base the number of times the base is used as a factor.

Question 10

Power

Answer 10

Consists of the Base and the exponent

Question 11

Base

Answer 11

What is being factored

Question 12

Numerical Expression

Answer 12

Consists of numbers, operation, and grouping symbols

Question 13

Variable

Answer 13

a letter that is used to represent one or more numbers.

Question 14

Algebraic expression

Answer 14

An a expression involving a variable

Question 15

Terms

Answer 15

the parts that are added together (which can be found in between numbers)

Question 16

Coefficient

Answer 16

the number with the term that has a variable

Question 17

Like terms

Answer 17

Values that have the same variable with matching exponents

Question 18

Constant terms

Answer 18

values that are defined

Question 19

Equation

Answer 19

a statement in which two expressions are equal

Question 20

Linear Equation (in one variable)

Answer 20

a equation that can be written in the form ax = b where a and b are constants and a DNE 0

Question 21

Mean, or average

Answer 21

the sum of the numbers divided by n, which is the amount of numbers

Question 22

Median

Answer 22

The middle number in the n amount of numbers, if n is even, its the average of the numbers

Question 23

Mode

Answer 23

in the amount of n numbers its the number that occur most frequently, there can be one, no mode, or more than one mode.

Question 24

Range

Answer 24

the difference between the greatest and the least data values

Question 25

Box and whisker plot ; lower quartile ; upper quartile

Answer 25

Statistical graph; median of the lower half; median of the upper half
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order data from least to greatest
find the minimum and maximum values, the median, and the lower and upper quartiles
plot the five numbers below a number line
draw the box, the whiskers , and a line segment through the median

Question 26

Histogram

Answer 26

a special type of bar graph

Question 27

Intervals

Answer 27

data values in a histogram are grouped in these

Question 28

Frequency

Answer 28

the number of data values in each interval

Question 29

Frequency distribution

Answer 29

shows how many times the numbers in each interval occur in the data