Evaluating Expressions

Front

What is a coefficient in an expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression. For example, in the expression 4m + n + 2, the coefficient of m is 4.

Front

What is the product of 4 and p?

Back

The product of 4 and p is written as 4p.

Front

Evaluate the expression 3x - 7 when x = 6.

Back

When x = 6, 3x - 7 = 3(6) - 7 = 18 - 7 = 11.

Front

Evaluate the expression bc + 5a when a = 3, b = 4, and c = -6.

Back

When a = 3, b = 4, and c = -6, bc + 5a = (4)(-6) + 5(3) = -24 + 15 = -9.

Front

Evaluate the expression z^2 - 2x when x = 5 and z = 4.

Back

When x = 5 and z = 4, z^2 - 2x = 4^2 - 2(5) = 16 - 10 = 6.

Front

What is an expression in mathematics?

Back

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

Front

What does it mean to evaluate an expression?

Back

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

Front

What is a variable in an expression?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign and represents a value, while an equation states that two expressions are equal.

Front

How do you find the value of an expression with multiple variables?

Back

To find the value, substitute each variable with its corresponding number and then perform the operations.