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liraira [26]
3 years ago
7

What is the sum of the arithmetic series? ∑[i=1,15,Fn=5i-1]

Mathematics
1 answer:
Helen [10]3 years ago
8 0
\bf \sum\limits_{i=1}^{15}\ 5i-1\implies 5\sum\limits_{i=1}^{15}\ i-\sum\limits_{i=1}^{15}\ 1\implies 5\left[ \cfrac{15(15+1)}{2} \right]-(15\cdot 1)
\\\\\\
5\cdot (15\cdot 8)-15\implies 585
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Answer:

there is not a complete question here ...

\sqrt{2} +1 is not in a denominator to rationalize

if it were you would multiply the rational expression (the fraction)

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Step-by-step explanation:

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2 years ago
I'm not sure how to do this! 50 points?
Rus_ich [418]

Answer:

MOP=33

Step-by-step explanation:

MOP + MON = NOP

Substitute what we know

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MON = 4x+9  

NOP = 90   right angle

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Combine like terms

7x+6 =90

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Divide each side by 7

7x/7 = 84/7

x =12

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6 0
3 years ago
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Lubov Fominskaja [6]

Answer:

n = 5.5

Step-by-step explanation:

4n - 10 = 12

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       4n = 22

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5 0
3 years ago
In a regular 52 deck of cards, what is the probability of picking a random spade, a 4 of any suit and then a random diamond with
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sample \: space = 52 \: cards \\ spades = 13 \: cards \\ number \: 4s = 4 \: cards \\ diamonds = 13 \: cards \\ note \: that =  \\ there \: is \: replacement \\ order \: does \: matter

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5 0
2 years ago
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