A. a = 12, b = any number other than 24
Answer:
Step-by-step explanation:
You can look at it and see that 1/3 is added to each term. The common difference is 1/3. If you want to be be more formal,
d = d4 - d3
d = 0 - - 1/3
d = 0 + 1/3
d = 1/3
f(1) = 4(1)-9 = 4-9 = -5
f(2) = 4(2)-9 = 8-9 = -1
f(3) = 4(3)-9 = 12-9 = 3
f(4) = 4(4)-9 = 16-9 = 7
Set would be {-5, -1, 3, 7 .....}
You would do 100-30 because 30 is what you have left and 100-30 is 70 so $70 was lost
