Algebra 1 1-1 Guided Practice: Variables and Expressions

Solve It! Consider the population of Florida, the area of Colorado, and the flight time from Philadelphia to San Fransisco.

Which of these has a value that varies? Select the most appropriate option.

Problem 1 Got it? What is an algebraic expression for 18 more than a number n?

Take Note: Match each mathematical operation on the left with the name for its result on the right.

Problem 2 Got it? What is an algebraic expression for 6 times a number n?

Enter only the expression, in simplest form.

Problem 2 Got it? What is an algebraic expression for the quotient of 18 and a number n?

Enter only the expression, in simplest form.

Problem 2 Got it? Reasoning: Do the phrases 6 less a number y and 6 less than a number y mean the same thing? Explain.

Problem 3 Got it? What is an algebraic expression for 8 less than the product of a number x and 4?

Problem 3 Got it? What is an algebraic expression for twice the sum of a number x and 8?

Problem 3 Got it? What is an algebraic expression for the quotient of 5 and the sum of 12 and a number x?

Problem 4 Got it? What word phrase can you use to represent the algebraic expression x + 8?

Problem 4 Got it? What word phrase can you use to represent the algebraic expression 10x + 9?

Problem 4 Got it? What word phrase can you use to represent the algebraic expression \frac{n}{3}?

Problem 4 Got it? What word phrase can you use to represent the algebraic expression 5x - 1?

Take Note: What is an algebraic expression?

Take Note: What is a numerical expression?

Take Note: Provide an example of a numerical expression.