An arithmetic series contains 20 numbers. the first number is 102. the last number is 159. which expression represents the sum of the series? a.(20 (159-102/2) b.(20(102+159/2) c.20(102+159) d.20(159-102)

Option B

Step-by-step explanation:

we know that

The sum of an arithmetic series is equal to

S=n(a1+an)/2

where

a1 is the first term

an is the last term

n is the number of terms

In this problem we have

n=20

a1=102

an=159

substitute the values in the formula

S=20(102+159)/2

this shows a reflection over the x-axis and is translated one unit down and 6 units to the right (x + 6, y - 1)

hope this !

~just a girl in love with shawn mendes