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:
x-y
Step-by-step explanation:
when you subtract (-2x-8y)-(-3x-7y)
you have to distribute that negative onto -3x-7y which turns it positive
which results in -2x-8y+3x+7y
simplified to x-y
What units were they originally on?do you have a picture of the graph with it?
Answer:
Step-by-step explanation:11+12/square root of 16
11+(12/4)
11+3
answer is 14
Answer:0.03
Step-by-step explanation: