3 years ago

Please help!! See the attachment, please!

Mathematics

1 answer:

topjm [15]3 years ago

5 0

Answer:

$946$

Step-by-step explanation:

we know that

The formula to find the sum is equal to

$S=(a1+an)n/2$

where

a1 is the first term

an is the last term

n is the number of terms

In this problem we have

$n=11$

$a1=(98-2(1))=96$

$an=(98-2(11))=76$

substitute the values in the formula

$S=(96+76)(11/2)=946$

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the correct choice is marked

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_____

<em>Additional comment</em>

Effectively, we have solved for the multiplier (40) that gives the ratio with 320 on top and a difference between top and bottom of 280:

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2 years ago

Please help!! See the attachment, please!​

Please help!! See the attachment, please!