Given:
The rule of input and output function is:

To find:
The answer if we put 19.
Solution:
Consider the input and output function is:

Substitute
, we get


Therefore, the required answer is 6.
The value of a would be 4.2, because the negatives cancel out each other.
Answer: A. and D.
Step-by-step explanation: Sorry if its wrong but that sounds right. The first week comes before the second week.
Answer:
267/500
Step-by-step explanation:
0.534 = 534 / 1000
Simplify to 267/500