13 - 7 = (10 + 3) - 7 = (10 - 7) + 3 = 3 + 3 = 6
1. x = 60 degrees, y = 50 degrees
2. e = 85 degrees
3. f = 158 degrees
7.7m is more precise because it has a decimal after it
Answer: $128
Step-by-step explanation: So first Bob earned 8 dollars. Then he started earning 10 dollars a day every week for 2 weeks. that would have been 148 dollars (plus the 8 dollars he earned in the beginning), but he took a break once a week, subtracting 20 dollars from his pay, giving him 128 dollars in total.
Let me know if this was helpful! :D