Answer:
0
Step-by-step explanation:
x2 +4x-21=0. solve for x


Answer:
12/5
Step-by-step explanation:
Answer:
154
Step-by-step explanation:
If the 7th term is 77 and the 8th term is 231, you have to subtract them and get your answer.
231-77=154
154 is the common ratio.
(if another person gets the same answer it is probably correct)