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2 years ago

7

What is the solution set for the inequality?

2 answers:

Slav-nsk [51]2 years ago

8 0

Answer: I say that the answer is D

Step-by-step explanation:

VARVARA [1.3K]2 years ago

6 0

Find out what x equals too

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<img src="https://tex.z-dn.net/?f=2x%20%7B%7D%5E%7B2%7D%20%20%2B%204x%20-%2021%20%3D%200" id="TexFormula1" title="2x {}^{2} + 4

Ugo [173]

The answer should be 21/8 hope it helps

7 0

3 years ago

Two shooters, Rodney and Philip, practice at a shooting range. They fire rounds each at separate targets. The targets are mark

Sedaia [141]

Complete Question

Answer:

a

$SE = 0.66}$

b

$-3.29 < \mu_1 - \mu_2 < -0.70$

Step-by-step explanation:

From the question we are told that

The sample size is n = 60

The first sample mean is $\= x _1 = 8$

The second sample mean is $\= x _2 = 10$

The first variance is $v_1 = 0.25$

The first variance is $v_2 = 0.55$

Given that the confidence level is 95% then the level of significance is 5% = 0.05

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the first standard deviation is

$\sigma_1 = \sqrt{v_1}$

=> $\sigma_1 = \sqrt{0.25}$

=> $\sigma_1 = 0.5$

Generally the second standard deviation is

$\sigma_2 = \sqrt{v_2}$

=> $\sigma_2 = \sqrt{0.55}$

=> $\sigma_2 = 0.742$

Generally the first standard error is

$SE_1 = \frac{\sigma_1}{\sqrt{n} }$

$SE_1 = \frac{0.5}{\sqrt{60} }$

$SE_1 = 0.06$

Generally the second standard error is

$SE_2 = \frac{\sigma_2}{\sqrt{n} }$

$SE_2 = \frac{0.742}{\sqrt{60} }$

$SE_2 = 0.09$

Generally the standard error of the difference between their mean scores is mathematically represented as

$SE = \sqrt{SE_1^2 + SE_2^2 }$

=> $SE = \sqrt{0.06^2 +0.09^2 }$

=> $SE = 0.66}$

Generally 95% confidence interval is mathematically represented as

$(\= x_1 -\= x_2) -(Z_{\frac{\alpha }{2} } * SE) < \mu_1 - \mu_2 < (\= x_1 -\= x_2) +(Z_{\frac{\alpha }{2} } * SE)$

=> $(8 -10) -(1.96 * 0.66) < \mu_1 - \mu_2 < (8-10) +(Z_{\frac{\alpha }{2} } * 0.66)$

=> $-3.29 < \mu_1 - \mu_2 < -0.70$

5 0

3 years ago

Olympia ate lunch at a restaurant. The amount of her check was $6.89. She left $8.00 on the table, which included the amount she

Stolb23 [73]

<span>6.89 + t = 8.00</span><span>
t = 8 - 6.89
t = 1.11

tips = $1.11

</span>answer

a.6.89 + t = 8.00

8 0

3 years ago

Read 2 more answers

Triple a number, minus the sum of the number and six

9966 [12]

$\large \mathfrak{Solution : }$

let the number be x

According to above statement :

3x - (x + 6)

3x - x - 6

2x - 6

6 0

2 years ago

Read 2 more answers

I have 12 apples, but I take 2, 3 are molding, 1 has a worm in it, I'm eating 1, and 3 fell on the floor... how much apples do I

solong [7]

Answer:

12 counting the one you're eating

Step-by-step explanation:

8 0

2 years ago