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joja [24]
3 years ago
6

If a^3-1/a^3=4 then what is the value of a-1/a ??

Mathematics
1 answer:
natita [175]3 years ago
5 0

Answer:

1 or -0.5±1.9365i

Step-by-step explanation:

We know that x^{3} - y^{3} = (x-y) ^{3} +3xy(x-y)

So plug in x=a and y=1/a, (a-1/a)^3+3*a*1/a*(a-1/a)=4

Let a-1/a=k, k^3+3k=4, k=1 or a complex conjugate -0.5±1.9365i

That's the answer.

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What property is illustrated by the statement? 0 + x = x<br><br>I don't know about this one. Anyone?
Sholpan [36]

Answer:

The answer is Identity Property of Addition :D


8 0
3 years ago
Frances gets 6 paychecks in 12 weeks. How many paychecks does she get in 52 weeks?
MA_775_DIABLO [31]
She would get 26


52/2=26
5 0
2 years ago
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Are American miles the same distance as U.K. miles?
MatroZZZ [7]

Answer:

yes they are

Step-by-step explanation:

because the metric system is the same

6 0
2 years ago
Warren has a container which holds 22 books of the same shape and size. The exact breakdown of his books is shown below:
ohaa [14]

Given:

Total number of book = 22

Number of white books = 6

Number of Purple books = 9

Number of green books = 7

To find:

The probability that Warren takes out a green book in both draws (with replacement).

Solution:

We know that,

\text{Probability}=\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}

P(\text{White})=\dfrac{6}{22}

P(\text{Purple})=\dfrac{9}{22}

P(\text{green})=\dfrac{7}{22}

After replacement, the probability of event remains the same and the independent.

The probability that Warren takes out a green book in both draws is:

P=P(\text{green})\times P(\text{green})

P=\dfrac{7}{22}\times \dfrac{7}{22}

P=\dfrac{49}{484}

Therefore, the correct option is (a).

7 0
3 years ago
Solve the system by the substitution method.
Ghella [55]

Answer:

A) The solution set is (6,-8).

Step-by-step explanation:

3x - y = 26

-3x       - 3x        Subtract 3x from both sides

-y = -3x + 26     Divide both sides by -1

y = 3x - 26

Now plug this into 7x + 8y = -22 to solve for x

7x + 8(3x - 26) = -22        Distribute

7x + 24x - 208 = -22       Combine like terms

31x - 208 = -22

     + 208    + 208            Add 208 to both sides

31x = 186                           Divide both sides by 31

x  = 6

Plug this into y = 3x - 26 to solve for y

y = 3(6) - 26           Multiply

y = 18 - 26              Subtract

y = -8

If this answer is correct, please make me Brainliest!

8 0
3 years ago
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