Answer:
#4
Step-by-step explanation:
Answer:
3 months old
Step-by-step explanation:
9 months for birth
and then the other 3 months is the age.
a is given to us so just plug a into the first equation:
b-3 - 3b =9
Add 3 to both sides:
b-3b=12
Combine like terms:
-2b=12
Divide by -2 to get b by itself:
b=-6
The only answer with b as -6 is the first one, (-9,-6)
Answer:
B. Recursive
Step-by-step explanation:
I calculated it logically
