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3 years ago

Find the common ratio for this geometric sequence 243, 27, 3

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

4 0

Answer:

The common ratio is 1/9

Step-by-step explanation:

To find the common ratio, take the second term and divide by the first term

27/ 243

1/9

We can check by taking the third term and dividing by the second

3/27 = 1/9

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Twice the sum of a number and six decreased by fifteen is the same as eighteen more than the product of five and the number. Fin

Arlecino [84]

Answer:

-9

Step-by-step explanation:

2(n+6) -15 = 5n+18

2n + 12 - 15 = 5n + 18

2n - 3 = 5n + 18

2n = 5n + 21

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n = -9

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3 years ago

Find the solution set for this equation: -a2+4a=0 (Separate the two values with a comma)

Rashid [163]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \: \{ 0,4 \}$

____________________________________

$\large \tt Solution \: :$

$\qquad \tt \rightarrow \: - {a}^{2} + 4a = 0$

$\qquad \tt \rightarrow \: - ( {a}^{2} - 4a) = 0$

$\qquad \tt \rightarrow \: {a}^{2} - 4a = 0$

$\qquad \tt \rightarrow \:a(a - 4) = 0$

The two cases are :

a = 0

a -4 = 0, that leads to a = 4

We can conclude :

$\qquad \tt \rightarrow \:solution \: (a) = \{ 0,4\}$

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

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2 years ago

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Answer:

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Step-by-step explanation:

∵ The line m is the central axis

So the radius is 4 units. ∴ Diameter is 8 units.

∵ The picture is a rectangle.

[ The rectangle rotates are its side to form a cylinder ]

So a cylinder with diameter 8 units.

The answer is A.

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2 years ago

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olasank [31]

Answer:

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Step-by-step explanation:

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