It would be a negative number due to the fact that there are three negative numbers. A negative times a negative makes a positive, so because there are three it means the negative won't cancel out.

4 0

4 years ago

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(7.3)2 + 9.1 divided by (8.7 - 6.1)<br>im not very good with math that much sorry !!

hoa [83]

Answer:

i think you put the 7.3X2+9.1 then divided it by 8.7 -6.1

Step-by-step explanation:

let me see if i can help you

6 0

3 years ago

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What is the sum of the arithmetic series 18 sigma t-1 (5t-4)?

just olya [345]

Answer:

783

Step-by-step explanation:

We have to find the sum of Arithmetic series from t = 1 to t = 18 represented by (5t - 4)

The formula to find the sum of an Arithmetic series when first and the last term is known is:

$S_{n}=\frac{n}{2}(a_{1}+a_{n})$

Here,

n = Total number of terms = 18

$a_{1}$ = First Term = 5(1) - 4 = 1

$a_{18}$ = 18th Term = 5(18) - 4 = 86

Using the values in the above formula, we get:

$S_{18}=\frac{18}{2}(1+86)\\\\ S_{18}=9(87)\\\\ S_{18}=783$

Thus, the sum of 18 terms of the given Arithmetic Series is 783.

3 0

3 years ago

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