Answer:
The correct approach is "-62". A further explanation is described below.
Explanation:
- A dependent variable could be seen since the blackheads become triggered whenever some substance or material is deposited between some of the teeth.
- Humans don't brush their teeth frequently, but there is still a significant possibility of decay, so cavities differ depending upon whether the specific teeth become brushed.
A. 8/$12=21/$x then cross multiply.
B. 1/$1.5
