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3 years ago

Solve the following inega) x² - 5x +4> 02

Mathematics

1 answer:

saveliy_v [14]3 years ago

7 0

Answer:

Inequality form: x<1 or x>4

Interval Notation:

(-∞,1)∪(4,∞)

I hope this helps you

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julsineya [31]

I got 16 but not 100% sure if it’s right
Sorry if it’s wrong, I tried my best

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3 years ago

Given: f(x)=x^(2)-3 and g(x)=x+1 the composite function g*f is

Ivenika [448]

Answer:

Step-by-step explanation:

I'm assuming g*f means g times f, so you want to multiply the two functions together.

(x² - 3)(x + 1) Since the product is 2 binomials, use FOIL

= x²(x) + x²(1) - 3(x) - 3(1)

which simplifies to

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3 years ago

Read 2 more answers

Scientific notation 100400

ad-work [718]

1.004 * 10^5
all scientific notation equations have to be a number greater than 1 but less than 10
then multiplied by 10 to the power of (move the decimal point to the right however many times you need, in this case 5) :)

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4 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir

Ksju [112]

Answer:

We need a sample size of at least 75.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, we find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So:

$\sigma = \sqrt{484} = 22$

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$5 = 1.96*\frac{22}{\sqrt{n}}$

$5\sqrt{n} = 43.12$

$\sqrt{n} = \frac{43.12}{5}$

$\sqrt{n} = 8.624$

$(\sqrt{n})^{2} = (8.624)^{2}$

$n = 74.4$

We need a sample size of at least 75.

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4 years ago

Read 2 more answers

Answer 2. will give brainliest

postnew [5]

Answer:

I think c and d

Step-by-step explanation:

srry if im wrong

3 0

3 years ago

Solve the following inega) x² - 5x +4> 02​

Solve the following inega) x² - 5x +4> 02