1st semester exam review

Question 1

real number

Answer 1

all numbers

Question 2

rational number

Answer 2

any number that can be written as a fraction or decimal

Question 3

integers

Answer 3

all positive and negative counting numbers including zero

Question 4

whole numbers

Answer 4

zero and positive counting numbers

Question 5

natural numbers

Answer 5

all positive numbers (not zero)

Question 6

irrational numbers

Answer 6

numbers that cannot be written as a fraction or are a non-repeating, non-terminating decimal

Question 7

imaginary numbers

Answer 7

all square roots of negative numbers

Question 8

‘p’ in PEMDAS

Answer 8

parenthesis

Question 9

‘e’ in PEMDAS

Answer 9

exponents

Question 10

‘m’ and ‘d’ in PEMDAS

Answer 10

multiplication and division

Question 11

‘a’ and ‘s’ in PEMDAS

Answer 11

addition and subtraction

Question 12

equation

Answer 12

mathematical sentence that includes an equal sign

Question 13

variable

Answer 13

letter that represents a number

Question 14

coefficient

Answer 14

number in front of a variable (example: 3x)

Question 15

solution

Answer 15

answer to an equation

Question 16

commutative property (addition)

Answer 16

a+b=b+a (switch or flip-flop)

Question 17

associative property (addition)

Answer 17

(a+b)+c=a+(b+c)

change groupings

Question 18

additive identity (addition)

Answer 18

a+0=a (same)

additive identity element is 0

Question 19

additive inverse property (addition)

Answer 19

a-(-a)=0

cancels-out

Question 20

commutative property (multiplication)

Answer 20

axb=bxa

switch or flip-flop

Question 21

associative property (multiplication)

Answer 21

(axb)xc=ax(bxc)

change groupings

Question 22

multiplicative identity (multiplication)

Answer 22

ax1=a

multiplicative identity element is 0) (same

Question 23

multiplicative inverse (multiplication)

Answer 23

a/1 x 1/a=1

reciprocal

Question 24

multiplication property of 0

Answer 24

ax0=0

any number multiplied by zero is zero

Question 25

is

Answer 25

=

Question 26

of

Answer 26

x (times)

Question 27

out of

Answer 27

divide

Question 28

what/how much

Answer 28

variable

Question 29

percent change

Answer 29

difference/original x 100

Question 30

unit rates

Answer 30

ratios that compare x units of one quantity to 1 unit of another quantity

Question 31

ratio

Answer 31

compares two values to each other, often written as a fraction, should always be written in simplest form

Question 32

proportion

Answer 32

a statement that two ratios are equal

Question 33

cross product rule

Answer 33

says that if two ratios are a proportion then their cross product is equal
example: 3/7 = 9/21
3x21=63 9x7=63

Question 34

constant of proportionality

Answer 34

unit rate

Question 35

independent variable

Answer 35

variable that’s changed

Question 36

dependent variable

Answer 36

variable that’s affected by the change

Question 37

y-intercept

Answer 37

point where the line hits the y-axis

Question 38

x-intercept

Answer 38

point where the line hits the x-intercept