Use the table given to answer questions (a) and (b).
- What was the total number of puffs sold?
- Express your answer in terms of z in the simplest form. If z = 19, how many more puffs were sold on Sunday than on Saturday?
Day | Number of puffs sold |
Monday to Friday | 5z per day |
Saturday | z + 36 |
Sunday | 4z - 5 |