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:
E(penny) = 1.75 and E(nickel) = 1.5, so she should play with the pennies
Step-by-step explanation:
I think that's the correct answer, since you didn't give us all the info needed.
Answer:
irrational
irrational
rational
irrational
rational
Step-by-step explanation:
A reciprocal is when you take the numerator and the denomenator switch.
So the reciprocal of 2/7 1/9 3/8 1/2 and 11/12 is 7/2 9/1 8/3 2/1 and 12/11
Answer: 62.5% 162.5%
and here is more words so the program lets me post this