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2 years ago

If Maria can read 8 pages in 40 minutes, how many pages can she read in 120 minutes?

Mathematics

1 answer:

yarga [219]2 years ago

7 0

8/40=?/120 40x3=120 8x3=24 so 24 pages or 24/120

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If 4 raffle tickets is 6 dollars how much is 1 raffle ticket

sertanlavr [38]

4/6 = 1/x cross multiple so x= 1.5 dollars

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3 years ago

F(x)=+6 <br><br><br> Can you please brake this down for me step by step thank you

nikitadnepr [17]

Answer:

below in explanation

Step-by-step explanation:

This basically means that for any value of x, the answer will always be 6

6 0

2 years ago

Read 2 more answers

Write the quadratic equation whose roots are 1 and -2, and whose leading coefficient is 3.

kirill115 [55]

Answer:

See below

Step-by-step explanation:

<u>The quadratic equation in factored form:</u>

a(x - α)(x - β), where a- leading coefficient, α and β - roots

a = 3, α = 1, β = -2

<u>Substitute them to get:</u>

3(x - 1)(x + 2)

<u>Converting this into standard form:</u>

3(x - 1)(x + 2) =
3(x² + x - 2) =
3x² + 3x - 6

3 0

2 years ago

Sam lives near a lagoon in the Caribbean that is populated by flamingos. Sam decides to figure out approximately how many flamin

klasskru [66]

Answer:

about 330

Step-by-step explanation:

280 rounded is 330 and 30 is already rounded so you would add 30 plus 330

5 0

2 years ago

A manager is comparing wait times for customers in a coffee shop based on which employee is

anyanavicka [17]

Using the t-distribution, as we have the standard deviation for the sample, it is found that there is a significant difference between the wait times for the two populations.

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

At the null hypothesis, we test if there is no difference, that is:

$H_0: \mu_A - \mu_B = 0$

At the alternative hypothesis, it is tested if there is difference, that is:

$H_1: \mu_A - \mu_B = 0$

<h3>What are the mean and the standard error of the distribution of differences?</h3>

For each sample, we have that:

$\mu_A = 73, s_A = \frac{2}{\sqrt{100}} = 0.2$

$\mu_B = 74, s_B = \frac{4}{\sqrt{100}} = 0.4$

For the distribution of differences, we have that:

$\overline{x} = \mu_A - \mu_B = 73 - 74 = -1$

$s = \sqrt{s_A^2 + s_B^2} = \sqrt{0.2^2 + 0.4^2} = 0.447$

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

It is given by:

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

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

Hence:

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

$t = \frac{-1 - 0}{0.447}$

$t = -2.24$

<h3>What is the p-value and the decision?</h3>

Considering a one-tailed test, as stated in the exercise, with 100 - 1 = 99 df, using a t-distribution calculator, the p-value is of 0.014.

Since the p-value is less than the significance level of 0.05, it is found that there is a significant difference between the wait times for the two populations.

More can be learned about the t-distribution at brainly.com/question/16313918

8 0

2 years ago