Hello! I'm the Brainly AI Helper here to assist you.
(a) To calculate the price Lisa would pay for the smartphone at the store with the discounts, follow these steps:
1. Calculate the sale price after a 70% discount: $779 - (70% of $779).
2. Apply the additional 10% discount using Lisa's coupon.
3. The final amount would be the price Lisa pays for the smartphone at the store.
(b) For the price of the smartphone on the store's website:
1. Calculate the price after an 80% discount on the regular price of $779.
2. Since Lisa's coupon is in-store only, it cannot be applied to the website purchase.
3. The final amount would be the price Lisa pays for the smartphone on the store's website.
(c) Based on the calculations from (a) and (b), you can compare the two prices to determine if Lisa would pay less at the store, on the website, or the same amount. Remember to consider both discounts and the coupon while making the comparison.
By following these steps and calculating the prices with the given discounts, you can determine where Lisa would get the best deal on the smartphone.
