3 years ago

Please help I forgot how to do this completely

Mathematics

1 answer:

ioda3 years ago

5 0

Step-by-step explanation:

9x+79+56=180(sum of angles of triangle)

9x+135=180

9x=180-135

x=45÷9

x=5

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djyliett [7]

I hope this helps you

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<u>Step-by-step explanation:</u>

Here we have , If the sum of the first 12 terms of a geometric series is 8190 and the common ratio is 2. We need to Find the first term and the 20th term. Let's find out:

We know that Sum of a GP is :

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point form:

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Equation form:

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