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3 years ago

The sum of 367 and 863 is equal to the sum of 863 and another number. what is that number?

Mathematics

2 answers:

dangina [55]3 years ago

7 0

Answer:

Sum of 367 and 863 is equal to the sum of 863 and 367. Thus, 367 is the required number.

Step-by-step explanation:

<u>Commutative property of Addition</u>

Let a and b be two real numbers. Then commutative property of addition states that the sum of a and b is equal to the sum of b and a that is

$a + b = b + a$

Similarly, we a re given here,

$367 + 863 = 1230\\1230 = 863 + 367$

Thus, sum of 367 and 863 is equal to the sum of 863 and 367.

Thus, 367 is the required number.

oksian1 [2.3K]3 years ago

4 0

The other no is
863-367 =496

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Answer:

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Step-by-step explanation:

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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Assuming the X follows a normal distribution

$X \sim N(\mu, \sigma=0.01)$

We know that the margin of error for a confidence interval is given by:

$Me=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The next step would be find the value of $\z_{\alpha/2}$ , $\alpha=1-0.95=.05$ and $\alpha/2=0.025$

Using the normal standard table, excel or a calculator we see that:

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If we solve for n from formula (1) we got:

$\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}$

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And we have everything to replace into the formula:

$n=(\frac{1.96(0.05)}{0.01})^2 =96.04$

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4 years ago

A pool measuring 10 meters by 26 meters is surrounded by a path of uniform width, as shown in the figure. If the area of the po

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Based on the measurements of the pool and the path of uniform width, the area of the width and length of the path can be found to be 28.8 meters.

<h3>How to find the width and length?</h3>

First, find the area of the pool:

= Length x Width

= 10 x 26

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The area of the path can therefore be found to be:

= Total area of pool and path combined - Area of pool

= 1,092 - 260

= 832 meters²

Seeing as the path has uniform width, that means that the width is the same and the length so the width and length of the pool is:
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= 28.8

In conclusion, the width and length of the path are 28.8 meters.

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1 year ago

1. Multiply (x+7)(x-7)

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X^2+7x-7x-49
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3 years ago

Y=3x-2 use a graph to estimate the value of x when y = 3

rodikova [14]

Answer:

5/3

Step-by-step explanation:

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2 years ago

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Suppose in a class of 60 students 5 have no siblings, 26 have one sibling, 14 have two siblings, and 15 have three siblings. Cal

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The relative frequency of students who have three siblings is 25% given that there are 60 students in a class in which 5 have no siblings, 26 have one sibling, 14 have two siblings and 15 have three siblings. This can be obtained by using the formula for relative frequency.

<h3>What is the relative frequency of students who have three siblings?</h3>

Given that,

total number of students in the class = 60

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Therefore,

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In percentage ⇒ 0.25 × 100 = 25%

Hence the relative frequency of students who have three siblings is 25% given that there are 60 students in a class in which 5 have no siblings, 26 have one sibling, 14 have two siblings and 15 have three siblings.

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