Question

choose the correct choice in the following and justify

and explain briefly plz
the question is in the pic ​

Answer 1

It goes backward so minus it will be -77

hopes it helps you

follow mark brainliest thank me

Answer 2

Answer:

$T_{30}=-77$ i.e C

Step-by-step explanation:

a=10,d=7-10  i.e d=-3

$T_{30}=a+(n-1)d\\=a+29d\\=10+29(-3)\\=-77$