Expressions Review (parts, writing, evaluating)

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 it mean to evaluate an expression?

Back

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

Front

What is a coefficient?

Back

A coefficient is a numerical factor in a term of an algebraic expression. For example, in 5x, 5 is the coefficient.

Front

How do you write an expression for a situation?

Back

Identify the quantities involved and their relationships, then use variables to represent unknowns and write an expression using mathematical operations.

Front

What is the difference between a constant and a variable?

Back

A constant is a fixed value (like 5), while a variable is a symbol (like x) that can represent different values.

Front

What is the expression for the total cost of renting a food truck for h hours?

Back

100h + 150, where 100 is the cost per hour and 150 is the initial fee.

Front

How do you translate a verbal phrase into an algebraic expression?

Back

Identify keywords in the phrase (like 'more than', 'times', 'sum') and use them to form an expression with numbers and variables.

Front

What is the expression for the cost of staying at a hotel for x nights?

Back

$20 + $80x, where $20 is the reservation fee and $80 is the cost per night.

Front

What does '4 times the sum of a number and 8' look like as an expression?

Back

4(n + 8), where n is the number.

Front

How do you find the value of an expression like 4(a + 5) + b when a=3 and b=8?

Back

Substitute a and b into the expression: 4(3 + 5) + 8 = 4(8) + 8 = 32 + 8 = 40.