Expressions, Equations, and Inequalities

Name ________________________________________ Date __________________ Class __________________ UNIT

3

Expressions, Equations, and Inequalities Performance Task Jessica’s Cell Phone Plan Number of Text Messages Cost ($)

50

75

100

125

35.00

35.75

36.50

37.25

1. Jessica’s cell phone plan charges her a monthly fee plus a charge for each text message she sends. The cost of her cell phone is shown in the table above. How much does Jessica pay for each text message? Show your work. _________________________________________________________________________________________ _________________________________________________________________________________________

2. What is the monthly fee for Jessica’s plan if she does not send any text messages? Show your work. _________________________________________________________________________________________ _________________________________________________________________________________________

3. What is an equation that shows the monthly fee, m, based on the number of text messages sent, t? _________________________________________________________________________________________

4. Jessica’s bill last month was $77.00. Use the equation you wrote in Exercise 3 to find the number of text messages Jessica sent last month. Show your work. _________________________________________________________________________________________ _________________________________________________________________________________________

5. Jessica wants to spend less than $80.00 per month on her cell phone. Write and solve an inequality that shows how many text messages Jessica must limit herself to in order to keep her monthly bill less than $80.00. Show your work. _________________________________________________________________________________________ _________________________________________________________________________________________

6. Jessica has the option to switch to a plan that charges $65.00 per month with unlimited text messages. Jessica typically sends about 900 text messages per month. Does it make sense for her to switch to the new plan? Explain. _________________________________________________________________________________________ _________________________________________________________________________________________ Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.

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