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3 years ago

Help !!!! I will mark as brainliest 20 points !!!! solve both of question !!!

Mathematics

2 answers:

Savatey [412]3 years ago

5 0

Answer:

solution is on the picture attached

Hope this helps

Lapatulllka [165]3 years ago

4 0

Answer:

a). k ≥ -1

b). k < 5

c). k ≤ 2

d). k > -3

Step-by-step explanation:

a). k ≥ - 3 + 2

k ≥ -1

b). 3k < 16 - 1

3k < 15

k < 5

c). -4k ≥ -5 - 3

4k ≤ 8

k ≤ 2

d). 3k > -10 + 1

3k > -9

k > -3

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Suppose a population has a mean of 400 and a standard deviation of 24. if a random sample of size 144 is drawn from the populati

Drupady [299]

Find the critical value or test statistic.
$z = \frac{m - \mu}{\sigma/\sqrt{n}} = \frac{404.5 - 400}{24/\sqrt{144}} = \frac{4.5}{2} = 2.25$

Find P(z > 2.25) using a normal distribution table

P(z > 2.25) = 0.0122

6 0

3 years ago

Hey:) can you please help me posted picture of question

AnnZ [28]

Answer:
x⁴ + 6x² + 9

Explanation:
To answer this question, we will multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.

This can be done as follows:
(x² + 3)(x² + 3)
x²(x²) + x²(3) + 3(x²) + 3(3)
x⁴ + 3x² + 3x² + 9
x⁴ + 6x² + 9

Hope this helps :)

5 0

3 years ago

Read 2 more answers

Which statement is an example of the Addition Property of Equality? (1 point). . If p = q then p • s = q • s .. If p = q then p

atroni [7]

The formal name for the property of equality that allows one to add the same quantity to both sides of an equation. This is one of the most commonly used properties for solving equations.

The formula tells us that if a = b, then a + c = b + c. The letters a and b stand for two separate numbers, our two twins, and the letter c stands for what we give to each twin to keep them matching. So, for example, if we add 1 to the left side of the equation, we must also add 1 to the right side of the equation. By doing this, we keep the equation, the twins, the same.

Answer: correct choice is B.

4 0

3 years ago

Read 2 more answers

Please help. asap. will mark brainliest

Dahasolnce [82]

Answer:

option 1 and option 2 should be correct

5 0

3 years ago

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.1 parts

satela [25.4K]

Answer:

$t=\frac{6.6-7.1}{\frac{1.0}{\sqrt{26}}}=-2.550$

Step-by-step explanation:

Data given and notation

$\bar X=6.6$ represent the sample mean

$s=1.0$ represent the sample standard deviation

$n=26$ sample size

$\mu_o =7.1$ represent the value that we want to test

$\alpha=0.01$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the true mean is different from 7.1 ppm, the system of hypothesis would be:

Null hypothesis: $\mu = 7.1$

Alternative hypothesis: $\mu \neq 7.1$

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{6.6-7.1}{\frac{1.0}{\sqrt{26}}}=-2.550$

5 0

3 years ago