evaluate expressions by substitution

Front

What does it mean to evaluate an expression by substitution?

Back

To evaluate an expression by substitution means to replace the variables in the expression with their given values and then perform the calculations.

Front

Evaluate the expression: 5(v + 1) if v = 4.

Back

25

Front

What is the result of evaluating 4y when y = 3?

Back

12

Front

Solve the expression: 6h + 30 when h = 6.

Back

66

Front

Evaluate the expression: 2(a - 5) + 2 when a = 10.

Back

12

Front

What is the value of the expression 4y - 5 when y = 6?

Back

19

Front

Define 'variable' in the context of algebra.

Back

A variable is a symbol, often a letter, that represents an unknown value in mathematical expressions or equations.

Front

What is an expression in mathematics?

Back

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

Front

What is the order of operations used when evaluating expressions?

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

Evaluate the expression: 3x + 4 if x = 2.

Back

10