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OLga [1]
2 years ago
6

How to solve f(4) = x^2+7x-22

Mathematics
1 answer:
geniusboy [140]2 years ago
6 0

Answer:

22

Step-by-step explanation:

1. Plugin 4 for each corresponding X value

2. Should look like 4^2+7(4)-22

3. Once ran through a calculator you should end up with a value of 22

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Which of the following is equal to (2x/3 - 7) + 7
diamong [38]
<span>The correct answer is D. The number 7 is subtracted from the first term, 2x/3, but then an equal sum is added, and the two effectively cancel each other out. This means that the value of the first expression is essentially 2x/3, which is option D.</span>
6 0
2 years ago
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A financial advisor is analyzing a family's estate plan. The amount of money that the family has invested in different real esta
Pachacha [2.7K]

Answer:

The amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

Step-by-step explanation:

Let the random variable <em>X</em> represent the amount of money that the family has invested in different real estate properties.

The random variable <em>X</em> follows a Normal distribution with parameters <em>μ</em> = $225,000 and <em>σ</em> = $50,000.

It is provided that the family has invested in <em>n</em> = 10 different real estate properties.

Then the mean and standard deviation of amount of money that the family has invested in these 10 different real estate properties is:

\mu_{\bar x}=\mu=\$225,000\\\\\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{50000}{\sqrt{10}}=15811.39

Now the lowest 80% of the amount invested can be represented as follows:

P(\bar X

The value of <em>z</em> is 0.84.

*Use a <em>z</em>-table.

Compute the value of the mean amount invested as follows:

\bar x=\mu_{\bar x}+z\cdot \sigma_{\bar x}

   =225000+(0.84\times 15811.39)\\\\=225000+13281.5676\\\\=238281.5676\\\\\approx 238281.57

Thus, the amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

6 0
2 years ago
What does the called 0.22
VashaNatasha [74]
Its a decimal...........
8 0
2 years ago
It takes Neil and Spencer the same amount of time to ride their bikes to school each day, though Neil lives farther away. This S
Ainat [17]

Answer:

they will get there at the same time

4 0
3 years ago
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Find the value of x.<br> 8<br> 5<br> X + 20<br><br> I need help please
Deffense [45]

Answer:

x=-\frac{68}{9}

Step-by-step explanation:

\frac{9}{14}=\frac{8}{x+20}\\

9(x+20)=8*14\\9x+180=112\\9x=-68\\x=-\frac{68}{9}\\

5 0
3 years ago
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