All categories

3 years ago

4(1/2+3/4)+(-2) equals what value?

Mathematics

1 answer:

Maksim231197 [3]3 years ago

8 0

Answer:

$4( \frac{1}{2} + \frac{3}{4} ) + ( - 2) \\ \\ 4( \frac{2 + 3}{4} ) + ( - 2) \\ \\ 4( \frac{5}{4} ) + ( - 2) \\ \\ = 5 - 2 \\ = 3$

I hope I helped you^_^

You might be interested in

Homework (5)

adelina 88 [10]

Answer:

Step-by-step explanation:

Let's set the ratio as

7x : 9x

If you add all the states that border an ocean and do not, you will get 48 states (because Alaska and Hawaii are not part of the continental US, as they do not touch the "main" part of the country)

So, we can write this equation.

7x + 9x = 48

Simplify.

16x = 48

Divide both sides by 16.

x = 4

Now, find how many states border an ocean. In our ratio, the number of states that border an ocean was 7x. Substitute x = 4 into 7x

7 * x = 7 * 4 = 28

The number of states that border an ocean is 28.

I hope this helps! Feel free to ask any questions!

7 0

3 years ago

HELP PLEASE ASAP HELP PLEASE HELP HELP PLEASE ASAP HELP ME PLEASE ASAP HELP PLEASE HELP ME

insens350 [35]

Answer:

i feel that the coorect answer is b

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

as shown in the diagram below, a building cast a 72 foot shadow on the ground when the angle of elevation of the sun is 40 degre

tester [92]

Answer:

Step-by-step explanation:

It is just 60 I did my work lol

6 0

3 years ago

A cereal box filling machine is designed to release an amount of 16 ounces of cereal into each box, and the machine’s manufactur

Paraphin [41]

Using the z-distribution, it is found that since the p-value is less than 0.05, there is evidence that the mean amount of cereal in each box is different from 16 ounces at 0.05 significance.

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

At the null hypothesis, it is tested if the mean is not different to 16 ounces, that is:

$H_0: \mu = 16$

At the alternative hypothesis, it is tested if the mean is different, hence:

$H_1: \mu \neq 16$

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

The test statistic is:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

$\sigma$ is the standard deviation of the population.

n is the sample size.

The parameters for this problem are:

$\overline{x} = 15.75, \mu = 16, \sigma = 1.46, n = 150$ .

Hence:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{15.75 - 16}{\frac{1.46}{\sqrt{150}}}$

z = -2.1

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

Using a z-distribution calculator, for a two-tailed test, as we are testing if the mean is different of a value, with z = -2.1, the p-value is of 0.0357.

Since the p-value is less than 0.05, there is evidence that the mean amount of cereal in each box is different from 16 ounces at 0.05 significance.

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

#SPJ1

3 0

2 years ago

Let f and g be functions given by f(x)=x^3 and g(x)=x^2 lxl

adell [148]

I post an image instead.
Correction: g(3)=(3²)|3|=9(3)=27

4 0

3 years ago