Final answer:
The given question does not provide sufficient data to calculate the values for -a and -g; to find the negative of a value, simply prefix it with a minus, and to add negative values, add the negatives of each value together.
Step-by-step explanation:
The question is asking for the operation to find the negative values of a and g. However, there is not enough information to provide a direct answer as the provided data seems to be part of various unrelated math or physics problems, none of which contain a clear definition or value for a and g in a way that would allow for their summation or for finding their negatives. Therefore, it's not possible to give an accurate result for -a - g based on the given data. In a typical math context, to find the negative of a value, you simply prefix it with a minus sign. For example, if a was 5, then -a would be -5. To add negatives of two values, you take the negative of each and then add them together. For example, if a = 5 and g = 3, then -a - g would be -5 - 3 = -8.