Help plzzzz ill give extra points

2 answers:

7 0

<h3>Solution :-</h3>

Total equation ,

$\displaystyle\sf\to 4x+\boxed{\sf 12}x=\boxed{\sf 320}$

$\displaystyle\sf\to \boxed{\sf 16}x=\boxed{\sf 320}$

$\displaystyle\sf\to x =\boxed{\sf 20}$

lbvjy [14]2 years ago

3 0

Answer:

12x

16x, 320

Step-by-step explanation:

Hope this helps

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navik [9.2K]

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Evgesh-ka [11]

Answer:

22.5

Step-by-step explanation:

If you expand the series, you can see the first few terms of the series:

We can see the series is 0, 0.5, 1, 1.5, ....

This is an arithmetic series with common difference (the difference in 2 terms) 0.5 and first term 0.

We know formula for sum of arithmetic series:

$s_{n}=\frac{n}{2}(2a+(n-1)d)$

Where,

$S_{n}$ denotes the nth partial sum
$a$ is the first term (in our case it is 0)
$n$ is the term (in our case it is 10 since we want to find 10th partial sum -- sum until first 10 terms)
$d$ is the common difference (difference in term and the previous term) (in our case it is 0.5)