Unit 2 Test Review

Front

What are coefficients in an algebraic expression?

Back

Coefficients are the numerical factors in front of variables in an algebraic expression. For example, in the expression 8f - 3g + m - 2, the coefficients are 8 and -3.

Front

How do you express the difference of a number and four in algebraic terms?

Back

The difference of a number and four can be expressed as x - 4.

Front

Evaluate the expression 5m + 2n when m = 4 and n = 7.

Back

When m = 4 and n = 7, 5m + 2n = 5(4) + 2(7) = 20 + 14 = 34.

Front

What expression represents the product of a number and six?

Back

The product of a number and six is represented as x ⋅ 6.

Front

How do you express the quotient of six and a number in algebraic terms?

Back

The quotient of six and a number can be expressed as 6 ÷ x.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 3x + 5 is an algebraic expression.

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in an expression or equation. For example, in the expression 2x + 3, x is the variable.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with specific numbers.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal, indicated by an equality sign.

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).