Diagnostic Test 100 Practice Question Lumos StepUp - Grade 6 Mathematics

Lumos StepUp - Grade 6 Mathematics Diagnostic Test

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Extended Constructed Response A

Here are some reminders for when you are completing this Extended Constructed Response Task:

  • Carefully read each part of the task before writing your response on a sheet of paper.
  • Be sure to complete all parts of the task.
  • Clearly explain your answer and show all your work.
  • Your explanation can include words, tables, diagrams, or pictures.
  • You may use a calculator and a ruler for this task.

The Note-Worthy Music Shop sells CD’s in its store locations for $13.00 each. They are trying to attract online buyers by offering deals through their website. CD’s purchased online cost $10.00 each. For online purchases, there is a one-time processing fee of $2.50, and a shipping fee of $1.50 per order.

Use the above information to complete the following:

The cost to buy n CD’s in the store could be found using:

C = $13.00(n)

Write an equation that could be used to find the cost of n CD’s purchased online.

If a customer wanted to buy 8 CD’s, which method would be a better choice? Explain your answer using information from the problem.