What is the 51st term of the sequence below?

-7,2,11,20

What is the 22nd term of the sequence below?

-9,-3,3,9

First determine whether arithmetic sequence or geometric

both seem to be arithmetic

first one

adds 9

starts with - 7

an=a1 + (n-1) d

a1=first term

d=common difference

an=-7+9 (n-1)

51 term is

a51=-7+9 (51-1)

a51=-7+9 (50)

a51=-7+450

a51=443

51term is 443

adds 6 every times

starts with - 9

an=-9+6 (n-1)

22nd term

a22=-9+6 (22-1)

a22=-9+126

a22=117

22nt term is 117