Expressions

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 the variable 'x' represent in an expression?

Back

The variable 'x' represents an unknown value that can change or vary.

Front

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

Back

27

Front

What does the expression 8w + t represent in a real-world context?

Back

It represents the total money made, where 'w' is the number of weeks worked and 't' is the tips received.

Front

If Michael works for 6 weeks and makes $20 in tips, how much money does he make using the expression 8w + t?

Back

$68

Front

Evaluate the expression: 2b + 3 where b = 7.

Back

17

Front

What is the purpose of evaluating an expression?

Back

Evaluating an expression helps to find the numerical value it represents when specific values are substituted for the variables.

Front

Evaluate the expression: m + 5p where m = 15 and p = 4.

Back

35

Front

What does the expression (c-a)^b represent when a=2, b=3, c=4?

Back

It represents the value of (4-2)^3, which equals 8.

Front

What is a variable in an expression?

Back

A variable is a symbol (like x or y) that represents an unknown value.