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Ipatiy [6.2K]
3 years ago
15

Find the ninth partial sum of infinite sumnation 3i-4

Mathematics
1 answer:
snow_tiger [21]3 years ago
3 0
\bf \sum\limits_{i=1}^9\ 3i-4\implies \sum\limits_{i=1}^9\ 3i-\sum\limits_{i=1}^9\ 4\implies 3\sum\limits_{i=1}^9\ i-\sum\limits_{i=1}^9\ 4
\\\\\\
3\cdot  \cfrac{9(9+1)}{2}-(9\cdot 4)

and surely you know how much that is.
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Irina18 [472]

Answer:

A 48

D 0

O 7.5 (fraction form: 7 1/2)

E 21

Next line

E 34

N 36.8 (fraction form: 36 4/5)

L 9

T 8

Step-by-step explanation:

A (a)(c)

A (12)(4)

A 48

D 48 - (a + c)

D 48 - (12 + 4)

D 48 - 48

D 0

O (5a)/8

O 5(12)/8

O 60/8

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E (ab)/c

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E 84/4

E 21

Next line

E 2b + 5c

E 2(7) + 5(4)

E 14 + 20

E 34

N c(9.2)

N 4(9.2)

N 36.8

L 72/2c

L 72/2(4)

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T (2/3)(12)

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3 years ago
The inequality 6-2/3x
densk [106]

Answer:

ask a teacher

Step-by-step explanation:

5 0
3 years ago
Find the volume of the composite solid.
erik [133]

Answer:

Equal.

Step-by-step explanation:

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V = length x width x height

V = 3a x 2b x c

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8 0
3 years ago
Plzzzzzzzzzzzzzzzz asap help
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Answer:

2.4

Step-by-step explanation:

Okay so first what you would do is find the common difference we can find this by doing 5/3 which is 1.66666666667 (rounded to 1.7)

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Given two central angles in any two circles, the ratio of the arc length to the radius of each corresponding circle is equal if
krok68 [10]
First, we have
s1/r1 = s2/r2

The question also states the fact that
s/2πr = θ/360°

Rearranging the second equation, we have 
s/r = 2πθ/360°

Then we substitute it to the first equation
s1/r1 = 2πθ1/360°
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which is now 
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By equating both sides, 2π and 360° will be cancelled, therefore leaving 
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6 0
3 years ago
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