Correct Answer is B: An=an-1+4.3
Step-by-step explanation:
Answer:
70 years old
300 - 160 = 140
140 ÷ 2 = 70
4
a=4/z
Here I took a picture of it instead of writing it out that way its easier to understand because it can be a bit confusing on brainly! Click to get full view!