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3 years ago

Define the word expression to me. Use proper English and complete sentences.

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

7 0

Answer:

yes

Step-by-step explanation:

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• Justin rides his bicycle 2.5 kilometers to school.

Jet001 [13]

First, 1950m=1.95km, as 1000m=1km.
Then, 2.5-1.95=0.55km
0.55km = 550m

8 0

3 years ago

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The sum of two numbers is 35 the smaller number is 7 less than the larger number what are the numbers

Keith_Richards [23]

14 and 21

14 + 7 is 21 and 21 + 14 is 35.

5 0

3 years ago

TASK 2

Snowcat [4.5K]

Step-by-step explanation:

The required shape is a square.

Refer to the attachment.

The sides of a square are equal. So, the answer is a square.

[Drawing Courtesy- Brainly app]

4 0

3 years ago

A researcher takes a simple random sample of 83 homes in a city and finds that the mean square footage is 1628 with a standard d

Anna [14]

Answer: (1583.63, 1672.37)

Step-by-step explanation:

Given : Sample size : n= 83

Sample mean : $\overline{x}=1628$

Sample standard deviation : $\sigma=243$

The population standard deviation $(\sigma)$ is unknown .

The confidence interval for population mean :

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}$

For 90% confidence , significance level = $\alpha=1-0.90=0.10$

Using t-distribution table , Critical t-value = $t_{(\alpha/2, n-1)}=t_{0.05,82}=1.6636$

, where n-1 is the degree of freedom.

Now , 90% confidence interval for the mean square footage of all the homes in that city will be :-

$1628\pm (1.6636)\dfrac{243}{\sqrt{83}}\\\\ 1628\pm (1.6636)(26.672715)\\\\\\\\\approx1628\pm 44.37\\\\=(1628- 44.37,\ 1628+ 44.37)\\\\=(1583.63,\ 1672.37)$

Hence, the 90% confidence interval for the mean square footage of all the homes in that city = (1583.63, 1672.37)

7 0

3 years ago

Answer the question with NUMBERS ONLY.

Katen [24]

Answer:

3÷45=15

6÷90=15

120÷8=15

6 0

3 years ago

Read 2 more answers