2 years ago

If AB= 4 units and DC=4 units , what is the length of BC

Mathematics

1 answer:

Degger [83]2 years ago

4 0

Answer:

4 units i think

Step-by-step explanation:

i dont know how beacuse 4 is answer

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The fifth term of a geometric series is 405 and the sixth term is 1215. Find the sum of the first nine terms. Don't know how to

Margarita [4]

Since the sixth term is 1215 and the 5th term is 405, we know each term is 3 times more than the last.
Let 'n' represent the first term, then the sum of the first 9 terms can be written as:
n+3n+9n+27n+81n+243n+729n+2187n+6561n
which sinplifies to 9841n
since each term is 3 times the last, the first term must be 405 divided by 3, 4 times in total, which is 5
Now subsitute 'n' for 5, and we get 9841(5)
which is 49205 which is the answer.

Hope this helps

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3 years ago

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AleksandrR [38]

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2 years ago

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mash [69]

Answer:

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Step-by-step explanation: