Expressions and Equations

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 is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing an equal sign (=).

Front

Evaluate the expression: 3c + 7d if c = 3 and d = 2.

Back

23

Front

Maria has 25 dollars. She buys a gallon of milk for $3.50. How many boxes of cereal can she buy if each costs $4.50?

Back

4 boxes

Front

What is the first step to solve the equation: 11 - 3x = 44?

Back

Subtract 11 from both sides.

Front

Evaluate the expression: 15f - 60 if f = 5.

Back

15

Front

Solve for z in the equation: 6z + 3 - 4z = 9.

Back

z = 3

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, meaning you can distribute a factor across a sum.

Front

What is a variable in mathematics?

Back

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