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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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If the basketball shown below has a radius of 6 inches from the center to the outside surface, approximately how many cubic inch
Soloha48 [4]

Answer:

The answer to your question is the letter A. 904.32 in³

Step-by-step explanation:

Data

radius = 6 in

Volume = ?

π = 3.1416

Formula

Volume = 4/3 πr³

-Substitution

Volume = 4/3 (3.1416)(6)³

-Simplification

Volume = 4/3 (3.1416)(216)

Volume = 2714.342 / 3

-Result

Volume = 904.7 in³

The closest answer to my result is A.904.3 in³

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3 years ago
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A cheerleading team practices each week for 375 minutes. The team practiced for 26 weeks during the year. How many minutes did t
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Answer:

9750 min or 162.5 hours

Step-by-step explanation:

375 times 26 = 9750

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2 years ago
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Which relationship in the triangle must be true ?
Ivan

Answer:

Choice B. sin(B)=cos(90-B)

Step-by-step explanation:

That cofunction identity is the one you looking for...choice B.

If you aren't convinced or don't know that identity, then maybe this will help:

90-B is actually the same thing as saying A for this right triangle since A+B=90.

So choice B basically says sin(B)=cos(A)

Well let's find both sin(B) and cos(A)

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Those are the same ratios!

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I need to know the answer
Ainat [17]

Answer:

a) 5

b) 20

c) 28

d) 10

Step-by-step explanation:

a) 7-2=5

b) 2(7)+3(2)

= 14+6

= 20

c) 2(7)(3)= 28

d) (7-2)^2

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2 years ago
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A study of six hundred adults found that the number of hours they spend on social networking sites each week is normally distrib
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The answer is C. 0.313
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