Answer:
5
Step-by-step explanation:
Each number is multiplied by 5 to get the next one
12s
5s + 7s = (5 + 7) s= 12s
This is your answer
smallest triangle BCD
x = 15
9/x = x/(16 + 9)
x² = 25(9)
x = ±15
your question is
z²+1+y where, y=4,z=3
3²+1+4
9+5
14
is your answer
