Use the table given to answer questions (a) and (b).
- What was the total number of cupcakes sold?
- Express your answer in terms of r in the simplest form. If r = 30, how many less cupcakes were sold on Saturday than on Sunday?
Day | Number of cupcakes sold |
Monday to Friday | 4r per day |
Saturday | r + 20 |
Sunday | 4r - 5 |