2 years ago

Help really need answer. Thanks

Mathematics

1 answer:

bazaltina [42]2 years ago

3 0

Answer:

The answer is 28

Step-by-step explanation:

28×15=420 pages

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Find $a_{1}$ by plugging in 1 into n:
$a_{1} = 98-2(1)=96$

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Now to find the sum your formula is:
$S_{n} = \frac{n}{2} ( a_{1} + a_{n})$
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Ostrovityanka [42]

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<h2>Below</h2>

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