Formulas and Properties

Question 1

Order of Operation

Answer 1

PEMDAS

Question 2

Mean

Answer 2

(Sum of Data/How many # of Data Points)

Question 3

Median

Answer 3

Middle Value

Question 4

Mode

Answer 4

Most Occurring Number

Question 5

Adding Numbers with the Same Sign

Answer 5

To add two numbers with the same sign, add their absolute value. The sum has the same sign as the addends.

Question 6

Adding Numbers with Different Signs

Answer 6

To add two numbers with different signs, find the difference of their absolute value. The sum has the same sign as the addends with the greater absolute value.

Question 7

Subtracting Numbers

Answer 7

To subtract a number, add its opposite.

Question 8

Multiplying Numbers with the Same Sign

Answer 8

The product of two positive numbers or two negative numbers is positive,

Question 9

Multiplying Numbers with Different Signs

Answer 9

The product of a positive number and a negative number, or a negative number and a positive number, is negative

Question 10

Dividing Numbers with the Same Sign

Answer 10

The quotient of two positive numbers or two negative numbers is positive.

Question 11

Dividing Numbers with Different Signs

Answer 11

The quotient of a positive number and a negative number, of a negative number and a positive number, is negative

Question 12

Probability of Two Independent Events

Answer 12

If A and B are independent events,

P(A and B) = P(A) * P(B)

Question 13

Probability of Two Dependent Events

Answer 13

If A and B are dependent events,

P(A then B) = P(A) * P(B after A)

Question 14

Steps for Solving a Multi-Step Equation

Answer 14

Clear of fractions and decimals, Use Distributive Property to remove parentheses on both sides, combine like terms on each side, undo addition and subtraction, undo multiplication and division.

Question 15

Solving Absolute Value Equations

Answer 15

To solve an equation in the form of [A] = b, when A represents a variable expression and b > 0, solve A = b and A = -b

Question 16

Solving Absolute Value Inequalities

Answer 16

! To solve an inequality in the form [A] < b, when A represents a variable expression and b > 0, solve for
-b < A < b
! To solve an inequality in the form [A] > b, when A represents a variable expression and b>0, solve for
A< -b or A > b

Question 17

Slope

Answer 17

(rise/run) = (y_2 - y_1 / x_2 - x_1)

Question 18

Slopes of Lines (+)

Answer 18

Is slanted upward from left to right

Question 19

Slopes of Lines (-)

Answer 19

Is slanted downward from left to right

Question 20

Slopes of Lines (0)

Answer 20

Is horizontal

Question 21

Slopes of Lines (Undefined)

Answer 21

Is vertical