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vodomira [7]
2 years ago
7

Simplify the following as much as possible: 6a – 3a + 9a

Mathematics
2 answers:
IRISSAK [1]2 years ago
7 0
6a - 3a + 9a= 12a yes u must makesure that u must have to do the working ive alrdy wrote it up there so u cn just follow okay thanks
NikAS [45]2 years ago
6 0

Answer: 12a

Step-by-step explanation:

All we need to do is combine the like terms. Which all of them have the common variable a so we can add and subtract them together.

6a - 3a + 9a

Working left to right according to pemdas we can subtract first.

3a + 9a

Now add.

12a

That is as far as we can simplify.

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A) Find a recurrence relation for the number of bit strings of length n that contain a pair of consecutive 0s.
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Answer:

A) a_{n} = a_{n-1} + a_{n-2} + 2^{n-2}

B) a_{0} = a_{1} = 0

C)   for n = 2

  a_{2} = 1

for n = 3

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for n = 4

a_{4} = 8

for n = 5

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Step-by-step explanation:

A) A recurrence relation for the number of bit strings of length n that contain a  pair of consecutive Os can be represented below

if a string (n ) ends with 00 for n-2 positions there are a pair of  consecutive Os therefore there will be : 2^{n-2} strings

therefore for n ≥ 2

The recurrence relation for the number of bit strings of length 'n' that contains consecutive Os

a_{n} = a_{n-1} + a_{n-2} + 2^{n-2}

b ) The initial conditions

The initial conditions are : a_{0} = a_{1} = 0

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for n = 2

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for n = 3

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for n = 4

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for n = 5

a_{5} = 19

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