2 years ago

I really need help lol SOMEONE HELP ILL MARK YOU AS BRAINLIESTTT

Mathematics

1 answer:

V125BC [204]2 years ago

6 0

Answer:it would be the fourth one

Step-by-step explanation:

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What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the

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The sum of all the measurements is just the average times the number.

$\bar x = \frac{1}{n} \sum_{i=1}^n x_i$

$\sum_{i=1}^n x_i = n \bar x$

So if the average of all 92 is 7 the sum of those is $92 \times 7$

The average of the last two is 7.2 so their sum is $2 \times 7.2$

That means the sum of the first 90 is $92 \times 7 - 2 \times 7.2$

so the average of the first 90 is

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7 times a number is 8 less than the square of that number. Find the negative solution.

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Answer:

-1

Step-by-step explanation:

The required relation is ...

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