Evaluate Expressions with Variables

Front

What is a variable in mathematics?

Back

A symbol used to represent an unknown value in an expression or equation.

Front

How do you evaluate an expression with a variable?

Back

Substitute the value of the variable into the expression and perform the arithmetic operations.

Front

What does the expression 3h represent if h=3?

Back

It represents the product of 3 and the value of h, which is 9.

Front

What is the result of n/3 when n=12?

Back

The result is 4.

Front

How do you simplify the expression 7n when n=10?

Back

You substitute 10 for n, resulting in 70.

Front

What is the value of the expression 7n-2 when n=3?

Back

The value is 19.

Front

What does the expression 4(f-5) represent if f=7?

Back

It represents 4 times the difference between f and 5, which equals 8.

Front

What is the importance of parentheses in mathematical expressions?

Back

Parentheses indicate the order of operations, ensuring that calculations within them are performed first.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is an expression in mathematics?

Back

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