All categories

3 years ago

If 3 times a certain number is increased by 4 the result is 28. What is the number?

1 answer:

8 0

3x+4=28 because 3 times an unknown number was mentioned first and mentioned together so they will be together, increased by 4 is +4 and comes after, the result of is the same as equals so you put the equals sign and whatever number they gave after.

You might be interested in

What number will be multiplied to give -100 and be added to give 8

andrew11 [14]

Answer:

-12.5

Step-by-step explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

6 0

3 years ago

A group of researchers are interested in the possible effects of distracting stimuli during eating, such as an increase or decre

Dmitry [639]

Using the t-distribution, it is found that since the p-value of the test is of 0.0302, which is less than the standard significance level of 0.05, the data provides convincing evidence that the average food intake is different for the patients in the treatment group.

At the null hypothesis, it is tested if the consumption is not different, that is, if the subtraction of the means is 0, hence:

$H_0: \mu_1 - \mu_2 = 0$

At the alternative hypothesis, it is tested if the consumption is different, that is, if the subtraction of the means is not 0, hence:

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

Two groups of 22 patients, hence, the standard errors are:

$s_1 = \frac{45.1}{\sqrt{22}} = 9.6154$

$s_2 = \frac{26.4}{\sqrt{22}} = 5.6285$

The distribution of the differences is has:

$\overline{x} = \mu_1 - \mu_2 = 52.1 - 27.1 = 25$

$s = \sqrt{s_1^2 + s_2^2} = \sqrt{9.6154^2 + 5.6285^2} = 11.14$

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:

$t = \frac{25 - 0}{11.14}$

$t = 2.2438$

The p-value of the test is found using a two-tailed test, as we are testing if the mean is different of a value, with t = 2.2438 and 22 + 22 - 2 = 42 df.

Using a t-distribution calculator, this p-value is of 0.0302.

Since the p-value of the test is of 0.0302, which is less than the standard significance level of 0.05, the data provides convincing evidence that the average food intake is different for the patients in the treatment group.

A similar problem is given at brainly.com/question/25600813

4 0

3 years ago

Stacy thinks her employer may not be withholding the correct amount from her paychecks for state income tax. She made arrangemen

lyudmila [28]

The answer is B) Stacy’s employer is withholding too little for state income tax.

Stacy's state income tax withholding should be:
163.88 x 19% = $31.14, which is less than $24.58

4 0

3 years ago

Estimate the area of Tennessee if the base of the parallelogram is 440 miles and the height is 100 miles. What is the estimated

Reika [66]

Answer:

44,000 square miles

3 0

3 years ago

Read 2 more answers

In 6 days, the temperature dropped 18 degrees. How many degrees per day did the temperature drop

Gekata [30.6K]

Answer: