Financial Literacy On a recent day, a Euro was equal to about 1.2 American dollars. Write an expression which estimates the number of dollars in x Euros.
Then estimate the number of American dollars equal to 25 Euros.

Justin is 2 years older than one third Marcella's age. Aimee is four years younger than 2 times Justin's age. Define a variable and write an expression to represent Justin's age. Then find Justin's age and Aimee's age If Marcella is 63 years old.

Find the Error Elisa is writing an algebraic expression for the phrase 5 less than a number. Find her mistake and correct it.

Persevere with Problems Wendy earns $2 for every table she serves plus 20% of the total customer order. Define a variable and write an expression to represent the amount of money she earns for one table.

Justify Conclusions If n represents the amount of songs stored on an MP3 player, analyze the meaning of the expressions n+7,  n-2, 4n, and n ÷ 2.

Justify Conclusions Determine whether the statement below is always, sometimes, or never true. Justify your reasoning.

The expressions x —3 and y— 3 represent the same value.

Reason Inductively Suppose x is an odd number. Write an expression to represent each of the following: