PA Midterm Unit 2 Review

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. It is always non-negative.

Front

Evaluate: |-3|

Back

3

Front

Evaluate: |7 - 10|

Back

3

Front

What is the formula for evaluating expressions with variables?

Back

Substitute the values of the variables into the expression and then perform the operations according to the order of operations (PEMDAS/BODMAS).

Front

Evaluate: |-a + 2b - 5c| for a = 2, b = -4, c = 3

Back

25

Front

Evaluate: |3x| - (2y + z²) for x = -2, y = 4, z = 5

Back

-27

Front

Evaluate: |5x - 8| for x = -6

Back

38

Front

What does the term 'variable' mean in mathematics?

Back

A variable is a symbol used to represent an unknown value in mathematical expressions or equations.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is a mathematical expression?

Back

A mathematical expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.