Answer:
Step-by-step explanation:
3y + x +7
Answer:

Step-by-step explanation:
Given that,
The value of 
We need to find an expression for
. To find it, put the value of n as (n-1). So,

Hence, the value of S(n-1) is equal to
.
Answer:
-6/5
Step-by-step explanation:
It's basically just multiplying. 9*4= 36 . so 36 different options.
Answer:
This isn’t really a valid equation, so I’m guessing you forgot to type something.
Step-by-step explanation: