2 years ago

In the picture, thanks :)

Mathematics

1 answer:

Mrrafil [7]2 years ago

8 0

Answer is G
2y-x=10
Division by 2 to get rid of it
Y-x=5
Add x to both side to make y to stay alone
Y=x+5

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What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47+ ...?

Alex

Answer:

$\huge\boxed{18,475}$

Step-by-step explanation:

The terms of this sum make the arithmetic sequence.

The fomula of a sum of <em>n</em> terms of an arithmetic sequence:

$S_n=\dfrac{[2a_1+(n-1)d]\cdot n}{2}$

We have

$a_1=2\\d=17-2=32-12=47-32=15\\n=50$

Substitute:

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