Someone help me with 12 pls plsssss plsssss

Answer:
Equation is 7n-9, a10=61
Step-by-step explanation:
nth term of an arithmetic sequence with first term a and common difference d is a+(n-1)d
Here, a=-2 , d=7
nth term is -2+(n-1)7=7n-9
a10=7*10-9=70-9=61