I believe the answer is 5:6
215 because you would add and subtract the numbers as you go them you come out with your answer
Here are the answers for the HW:
Answer:
47.
Step-by-step explanation:
1) the rule:

where a;b are 0 and 12, f(x)=x²-1.
2) according to the rule above:

Step-by-step explanation:
£22.25 pls mark brainliest thanks