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DedPeter [7]
2 years ago
13

HELPPP WILL MARK BRAINLYIST IF RIGHT

Mathematics
1 answer:
Bingel [31]2 years ago
7 0

Answer:

550.92

Step-by-step explanation:

plz mark brainliest even if im wrong, i really need this, and if im wrong tell me im wrong so I cant correct it

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Ben scores 56 out of 79 what is his percentage to the nearest decimal spac
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89.7% us what I found
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3 years ago
Which of the following is a root of the polynomial function below
VMariaS [17]

Answer:

A) 2 + i

Step-by-step explanation:

F(x) = x^3 - 3x^2 + x + 5

0 = x^3 - 3x^2 + x + 5

0 = (x+1)(x^2 - 4x + 5)

Great, now we can separate these two parenthesis expressions because of the Zero Product Property. Start with the simple one:

0 = x + 1

<u>x = -1</u>

We have our first real root! But it doesn't look like that's one of the answer choices, so move on to the other expression:

0 = (x^2 - 4x +5)

This expression can't be factored, so we will use the quadratic formula (which is x = \frac{-b+-\sqrt{b^{2}-4ac }  }{2a}).

First solve for the positive part:

= (4 + sqrt(16-20)) / 2

  = 4 + sqrt(-4) / 2

  = 4 + 2i / 2

  <u>= 2 + i</u>

Then for the negative part:

= (4 - sqrt(16-20)) / 2

  = 4 - sqrt(-4) / 2

  = 4 - 2i / 2

  <u>= 2 - i</u>

<u></u>

<u>2 + i</u> is answer choice A! Our other roots, <u>2 - i</u> and <u>-1</u>, aren't answer choices.

8 0
3 years ago
You and your friend are selling raffle tickets for a new laptop. you sell 14 more then your friend sells. Together you and your
elixir [45]
X - 14 = y
x + y = 58

x is the amount you sold 
y is the amount your friend sold
4 0
3 years ago
Read 2 more answers
Annual salary plus bonus data for chief executive officers are presented in the BusinessWeek Annual Pay Survey. A preliminary sa
Anuta_ua [19.1K]

Answer:

175

Step-by-step explanation:

The sample size n in<em> Simple Random Sampling</em> is given by

\bf n=\frac{z^2s^2}{e^2}

<em> where z = 1.96 is the z-score associated with a 95% confidence level ans s the standard deviation. </em>

Replacing values

\bf n=\frac{(1.96)^2(675)^2}{(100)^2}=175

So, there should be 175 chief executive officers in a sample if we want to estimate the population mean annual salary plus bonus with a margin of error of $100,000

7 0
3 years ago
Helpmeeeeeee pleaseeeeeeeeeeeeeeeeeeeee
mylen [45]
D: NP=1.25, because the ratio of 8/2 is equal to 5/X.
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