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Algebra 2 Lab Final Exam – Spring 2015
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28. Solve the equation: 2x 2 10x 0 . Check your solution(s) and state the final
solution set. Show all your work.
29. Allegra has a cell-phone plan that charges $65 per month and $0.10 for every
minute that she uses the phone beyond what her plan allows. One month, she
was billed $73.40.
a. Define a variable for the unknown.
b. Write an equation to model the problem. Explain your answer.
c. Solve the equation. Show your work.
d. Find the number of minutes that Allegra went over the time that the plan
allows. Explain your answer.
30. A manufacturer makes a rectangular blanket in several styles and sizes. The
outline of a popular blanket in Size A is shown below.
A. Write a polynomial expression, in simplified form, that represents the
perimeter of the blanket.
B. Write a polynomial expression, in simplified form, that represents the area of
the blanket.
C. The same style blanket in Size B has width 2x + 10 and length 4x – 10. Write a
polynomial expression, in simplified form, that expresses the difference in area
of Blankets A and B. Show all your work.
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