Writing and evaluating algebraic expressions

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 does it mean to evaluate an algebraic expression?

Back

To evaluate an algebraic expression means to substitute the values of the variables into the expression and perform the operations to find a numerical value.

Front

Evaluate the expression: 5 + b + c when b = 2 and c = 7.

Back

14

Front

Write the phrase for the algebraic expression: 9 - e.

Back

9 less e.

Front

Evaluate the expression: 22 + b - c when b = 2 and c = 7.

Back

17

Front

What is the algebraic expression for 'subtract 9 from b'?

Back

b - 9.

Front

Evaluate the expression: 16 + b - c when b = 2 and c = 7.

Back

11

Front

What is a variable in algebra?

Back

A variable is a symbol, usually a letter, that represents an unknown value in an expression or equation.

Front

What is a constant in algebra?

Back

A constant is a fixed value that does not change. For example, in the expression 3x + 5, the number 5 is a constant.

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.