Answer:
If a, b and c are in arithmetic progression, that means that a + c = 2b. So a + b, a + c and b + c are also in arithmetic progression.
This might help.
5 can go into 20 numbers between 1-100 and 8 can go into 12 numbers between 1-100
F(x)=2x
I would write that since x represents the weeks and we know that she watches two movies a week
y=45x+200
y is the total cost, x is the number of months, and 200 is the start.
