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olga2289 [7]
3 years ago
14

Find the roots of the quadratic equation x^2 – 8x = 9 by completing the square. Show your work.

Mathematics
1 answer:
loris [4]3 years ago
3 0
X² - 8x = 9
x² - 8x - 9 = 0
x² + x - 9x - 9 = 0
x(x + 1) -9(x + 1) = 0
(x+1)(x-9) = 0
x = -1 or 9

In short, Your Answers would be -1 & 9

Hope this helps!
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I need help with this question
kirill115 [55]

Answer:

PART A:

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PART B:

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PART C:

WEEK 10

Step-by-step explanation:

PART A:

Peter saves $10 every week why GIWA saves $10 every two weeks making it $5 every week.

PART B:

GIWA started with more money. He started with $ 70 why Peter started with $20

PART C:

They both had $120 in the tenth week

5 0
3 years ago
? What is the next step in the proof? Choose the most logical approach. Given: Transversal t passes through parallel lines r and
ExtremeBDS [4]
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7 0
3 years ago
Read 2 more answers
A flash disk has the capacity of storing 1 megabyte of data. How many kilobytes of data can be stored in the same flash disk​
Luden [163]

For this sort of problem, you need to be familiar with prefixes.

So:

megabyte = 1 *10^6 bytes

kilobyte = 1*10^3 bytes

and a regular byte would just be 1

Now, you will need to do a conversion:

1megabyte*\frac{1*10^6bytes}{1megabyte}*\frac{1*10^{-3}kilobyte}{1byte}

I'm going to explain this just in case, but we convert megabytes to regular bytes in the first half by using the information I gave you above. (In one megabyte, there are 1*10^6 bytes!)

In the second fraction thought, remember one kilobyte is 1*10^3 bytes. However, you usually only see one of each thing on the bottom of fractions, so you need to add a negative sign to the 3. (technically you could just do \frac{1kilobyte}{1*10^3bytes}, but I think it is more correct to do write it out how I did).

*** They do equal the same thing though! Do whichever way is easier for you!

Now, your answer should be:

10^3 kilobytes (1000 kilobytes)

Hope this helped!

6 0
3 years ago
Tricia has $37.25 in her account. Which shows the amount she will have left after she writes a check for $23.99?
aliya0001 [1]
C :) brainiest? This is correct because I did the math lol
4 0
3 years ago
Find the population variance of: 4 6 8 9 9 <br><br> round to the nearest hundredth
soldi70 [24.7K]

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

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(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24

Add together those numbers and divide them by 5:

\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76

5 0
3 years ago
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