Answer:
The total number of students on the bus if there are 15 females and n males
Step-by-step explanation:
The total number usually means addition, as well as 15 females + n males would give you the total
Diagonals bisect each other



Option B
Answer:
B
Step-by-step explanation:
Assume both their ages are 
One is 3 years older than the other, and the sum of their ages add up to 19

Answer:
B. g/cm3
Step-by-step explanation: