Let w represent the number of weeks. Cali is paying off $4/week and has already paid $3. The total she will pay is 4w + 3. She owes a total of $19. 4w + 3 = 19
Step-by-step explanation: First, turn 15% into the decimal 0.15, then multiply by 45, which equals 6.75. Now add 6.75, which is the amount the waitress got tipped to 45, which equals 51.75$ total.
