60-3d + 20-6 =4d
74-3d =4d
-3d =4d -74
-7d = -74
D=74/7
The correct answer is A $152.50 if you add up all of the numbers then divide by the total amount of numbers then you have your answer also known as the mean of the data
Answer:
Nikolaus Otto was responsible for inventing the first working four-stroke engine.
Step-by-step explanation:
