Which equation could be used to calculate the sum of the geometric series? 1/3 + 2/9 + 4/27 + 8/81 + 16/243?

  = a() when r1

and   =   when r1

Explanation:

where a is first term of geometric series

r = common ratio of geometric series

n= number of terms of geometric series

In the given series a=  

r=

n=5

So, substituting the values in the equation for r1

you will get the required result

73.0769230769% of the games were won

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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