Algebraic Expressions

Front

What are variables in an algebraic expression?

Back

Variables are symbols that represent unknown values, commonly denoted by letters such as x and y.

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression, such as the ⅙ in ⅙h.

Front

How do you evaluate an algebraic expression?

Back

To evaluate an expression, substitute the values of the variables into the expression and perform the arithmetic operations.

Front

What is the expression for the cost of p pounds of strawberries at $1.95 per pound?

Back

The expression is $1.95p.

Front

What does the expression 21h represent?

Back

It represents 21 dollars earned per hour.

Front

What is the value of the expression 7x + 6y - 9 when x = 1 and y = 2?

Back

The value is 7(1) + 6(2) - 9 = 7 + 12 - 9 = 10.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.

Front

What is the term for the number that stands alone in an algebraic expression?

Back

The term is called a constant.

Front

How do you combine like terms in an expression?

Back

To combine like terms, add or subtract the coefficients of terms that have the same variable raised to the same power.

Front

What is the expression for the perimeter of a rectangle with length l and width w?

Back

The expression is 2l + 2w.