### Home > CCA > Chapter 4 > Lesson 4.1.2 > Problem 4-25

Write expressions to represent the quantities described below. Homework Help ✎

Geraldine is

years younger than Tom. If Tom is *t*years old, how old is Geraldine? Also, if Steven is twice as old as Geraldine, how old is he?Geraldine is 4 years younger than Tom, so Tom's age subtracted by 4 is Geraldine's age: (

*t*− 4)Steven is twice as old as Geraldine: 2(

*t*− 4). Remember that Geraldine's age is equal to (*t*− 4).people went to see “Ode to Algebra” performed in the school auditorium. If the number of children that attended the performance was *c*, how many adults attended?We know that a total of 150 people attended the Ode to Algebra. There were two main groups of people

(the children and the adults) so: (150 −*c*) yields the amount of adults.The cost of a new CD is

, and the cost of a video game is . How much would *c*CDs and*v*video games cost?

Refer to both problems (a) and (b) for help. Use what you know about the problem to create a

logical expression.