What does it call to be solved for?

12, since -7 is multiplied by an invisible negative one.

So are you asking for something like 200! but only to 100 and to determine the amount of zeros from the product?

c:

90 - 39 = 51

D. Is the closest answer. Though there is a certain, microbe that allows for import/exports.

So at first, the dog moved 6 meters in one second (velocity = 6 meters/second) then moves 4 meters in one second (velocity = 4 meters/second). You need acceleration or something?

It may not be considered positivity, though it is inspiratonal in a sense.