SY23-24 Standard Unit 2 Expressions, Equations , Inequalities

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

Define an equation.

Back

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

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions and shows that one is greater than, less than, or not equal to the other.

Front

What does 'solving an equation' mean?

Back

Solving an equation means finding the value(s) of the variable(s) that make the equation true.

Front

What is the variable in an expression or equation?

Back

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

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, you perform inverse operations to both sides of the equation until the variable is alone on one side.

Front

What is the first step in solving the equation: -2.6 + x = -4.6?

Back

The first step is to add 2.6 to both sides of the equation.

Front

What does 'five less than' indicate in an equation?

Back

'Five less than' indicates subtraction; for example, 'five less than a number x' is written as x - 5.

Front

How do you represent 'the quotient of a number and 3' in algebra?

Back

It is represented as x/3, where x is the unknown number.

Front

What is the solution to the equation: 50 + 20m = 290?

Back

The solution is m = 12.