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2 years ago

What is a algebraic expression

Mathematics

2 answers:

alexgriva [62]2 years ago

8 0

Answer: An algebraic expression is a mathematical phrase that can contain numbers and/or variables.

Step-by-step explanation:

Zarrin [17]2 years ago

4 0

Answer:

Algebraic expression is an expression built up from integer constants, variables, and the algebraic operations

Step-by-step explanation:

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Without solving the equations which answer best describes the solutions.

telo118 [61]

ANSWER:
D. The answers will be different because after distributing the 4 in the first equation it will change the values.

Hope it helps u!

6 0

2 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

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2 years ago

Find what is asked for:

BaLLatris [955]

Ummmmmmmmmm let me think

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3 years ago

Nancy and Bill collect coins. Nancy has x coins. Bill has 3 coins fewer than two times the number of coins Nancy has. Write and

Hatshy [7]

Nancy & Bill can have 2x-5 coins

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