17. The variable "a" represents the age of the child
18. The variable "A" represents the adult dosage
19. The prescribed dosage of the medicine for the 6-year-old child is 60 milligrams.
Work: C=6/(6+12)·180
C=6/(18)·180
C=60
Linked the answer below not sure if it’s right tho
The answer is C because the x value doesn’t repeat
Are you asking for the letter or what the line is called because if it's just the letter then it is r if it is the name then its a plane intersect.
