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4 years ago

How many hours are in a week? Explain.

Mathematics

2 answers:

Dovator [93]4 years ago

3 0

Answer:

168

Step-by-step explanation:

There are 24 hours in a day and 7 days in a week; Therefore, all you have to do is multiply 24 by 7:

$24\times7=168$

Anvisha [2.4K]4 years ago

3 0

Answer:

168

Step-by-step explanation: There are 7 days in a week each day is 24 hours. So everyday adds 24 more hours. So 7 multiplied by 24 is 168. There are 168 hours in a week.

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Evaluate 6 + 2 when 2 = 3.

qaws [65]

6 + 2 = 12

When 2 = 3

Change the equation to: 6 + 3

So,

6 + 3 = 9

You're answer is 9

3 0

3 years ago

Your uncle is 2 years older than 3 Times your age you are x years old x=2 write an expression to describe your uncles age you ar

kirza4 [7]

Because you are 12 you put down

12

x can be anything so if you write

12x

You can later substitute it for 3. 12(3)

Your uncle is 2 years more

12x+2 is your equation
or
12(3) + 2

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4 years ago

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Is the unknown side a leg of the triangle or the hypotenuse?

Brilliant_brown [7]

Answer:

I think it a triangle

3 0

3 years ago

Read 2 more answers

ASAP HELP PLEASE!!!!!

Step2247 [10]

c because I don’t know. I don’t know how to explain to it

4 0

3 years ago

within a kiambu county,students were randomly assigned to one of two mathematics teachers.Mrs.Elite and Mrs. Bright. After the a

DerKrebs [107]

Using the t-distribution, as we have the standard deviation for the samples, it is found that since the absolute value of the test statistic is greater than the critical value, we reject the claim that Mrs.Elite and Mrs. Bright are equally effective teachers.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, we test if they are equally effective teachers, that is, the subtraction of their means is 0, hence:

$H_0: \mu_1 - \mu_2 = 0$

At the alternative hypothesis, we test if they are not equally effective teachers, that is, the subtraction of their means is not 0, hence:

$H_1: \mu_1 - \mu_2 \neq 0$

<h3>What is the distribution of the differences?</h3>

For Mrs. Elite, we have that:

$\mu_1 = 78, \sigma_1 = 10, n_1 = 30, s_1 = \frac{10}{\sqrt{30}} = 1.82574$

For Mrs. Bright, we have that:

$\mu_2 = 85, \sigma_2 = 15, n_2 = 25, s_2 = \frac{15}{\sqrt{25}} = 3$

For the distribution of differences, we have that:

$\overline{x} = \mu_1 - \mu_2 = 78 - 85 = -7$

$s = \sqrt{s_1^2 + s_2^2} = \sqrt{1.82574^2 + 3^2} = 3.5119$

<h3>What is the test statistic?</h3>

The test statistic is given by:

$t = \frac{\overline{x} - \mu}{s}$

In which $\mu = 0$ is the value tested at the null hypothesis.

Hence:

$t = \frac{\overline{x} - \mu}{s}$

$t = \frac{-7 - 0}{3.5119}$

$t = -1.99$

Considering a<em> two-tailed test</em>, as we are testing if the mean is different of a value, with 30 + 25 - 2 = <em>53 df and a significance level of 0.1</em>, the critical value is of $|t^{\ast}| = 1.6741$ .

Since the absolute value of the test statistic is greater than the critical value, we reject the claim that Mrs.Elite and Mrs. Bright are equally effective teachers.

To learn more about the t-distribution, you can take a look at brainly.com/question/13873630

3 0

3 years ago