Module 2
The problem you must solve is:
Ella has two coupons from a popular clothing store: a 15% off coupon and a $35 off coupon. At the checkout counter, Ella’s purchase comes to $398.69 before any of the coupons have been applied. When Ella shows the cashier her coupons, Ella is surprised and pleased to learn that she will be allowed to use both coupons for her purchase.
Ella wondered: “Wouldn’t I pay less if I apply the $35 off coupon then the percentage?”
First, guess. Do you think Ella is correct? Why? (be sure to state your guess and your reasoning)
Then, calculate. ..
a How much would it cost if she applied the $35 coupon first and then the
15% off?
- b How much would it cost if she applied the 15% off coupon first and then
- the $35 off?
3. Based on what your calculations showed, how would you respond to Ella’s question? Support your answer with a detailed mathematical explanation.
- How do these results compare with the problem you solved in the discussion activity? Explain…give specific similarities and differences.
Do you think this would always be the case? Using a different set of numbers, that you choose, do part 2a and 2b again to show another example.
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