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zubka84 [21]
3 years ago
11

How do I solve log(2)t^3-1=-3?

Mathematics
1 answer:
Ne4ueva [31]3 years ago
3 0
Assuming you mean
log_2(t^3-1)=-3
remember
log_a(b)=c translates to a^c=b
translate

log_2(t^3-1)=-3 translates to 2^{-3}=t^3-1
\frac{1}{2^3} =t^3-1
\frac{1}{8} =t^3-1
add 1 to both sides
\frac{9}{8} =t^3
cube root both sides
\frac{ \sqrt[3]{9} }{2}=t
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Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

3 0
4 years ago
a baker used 660 boxes of cake mix to make a wedding cake. if each box called for 3 eggs, how many dozen eggs were used to make
yanalaym [24]
We know there’s 660 boxes and each box called for 3 eggs, therefore:

660=3X

when divide both sides by 3 to isolate the x, which will tell us the amount of eggs used…

660/3 = 220
6 0
3 years ago
Can some solve me this one question
iogann1982 [59]
What is the question?
7 0
3 years ago
Please Help!!!
myrzilka [38]

Answer:

A. principal interviewed the 25 students who scored highest on a reading test.

D. For a report on the exercise habits of adults, Sergio talked to 30 adults at a local fitness center.

E. Josh asked the first 25 people he met at the dog park if they preferred dogs or cats.

Step-by-step explanation:

Biased means if the selection of every unit does not have an equal chance of being selected in a sample.

The sample is said to be good if choosing the unit is unbiased. The sample is said to be unbiased if the selection of each unit is independent.

Option A is an example of data selected in a biased way because principal chose only those student who scored the highest marks on reading test.

Options B and C are unbiased as here a selection of each number and name of the student has an equal chance of being selected.

Option D is biased because Sergio talked adults at a local fitness center where people go for maintaining their health. So, there is a chance of the selection of fitted adults more than unfitted adults.

Option E is biased because Josh met people at the dog park where dog lovers are more than a cat lover.

7 0
4 years ago
Read 2 more answers
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA POINTS*.. <br> IM GIVING 40 POINTS !! DONT SKIP :((.
Ne4ueva [31]
It’s just y= 17x. There’s nothing added or subtracted, or else it wouldn’t be (0,0).
6 0
3 years ago
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