Answer:
4
Step-by-step explanation:
d = -12
a2 = 100
We know the formula for the terms of an arithmetic sequence is
an = a1+d(n-1)
We can find the first term
100 = a1-12(2-1)
100 = a1-12(1)
Add 12 to each side
112 = a1
The first term is 112
Using the formula with n=10
a10 = 112-12(10-1)
a10 = 112 -12(9)
= 112-108
= 4
