Mathematics: Find the distance between the points 1,4 and (-2,-1

Find the distance between the points 1,4 and (-2,-1

Ответ:

sarahelisabeth444

11.01.2022

$\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 1}}\quad ,&{{ 4}})\quad 
% (c,d)
&({{ -2}}\quad ,&{{ -1}})
\end{array}\qquad 
% distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
d=\sqrt{(-2-1)^2+(-1-4)^2}\implies d=\sqrt{(-3)^2+(-5)^2}
\\\\\\
d=\sqrt{9+25}\implies d=\sqrt{34}$

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Ответ:

mosesbalan7159

21.12.2020

Mathematics

The number of items.

Step-by-step explanation:

1. add up all the prices of items.

2. divide by the number/amount of items.

This is how u figure out what the mean or in other words, average is.

Example:

There are three items, 1 apple, 1 orange, and 1 lemon. The cost of the apple is $1.50, the cost of the orange is $1.70, and the cost of the lemon is $1.90. We must add the cost of each other. The total of these 3 items is $3.40. Since we want to find the mean of these items we will have to divide by 3 since there are 3 items. This will give us a mean of $1.70.

Hope this helps ! :)

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Find the distance between the points 1,4 and (-2,-1

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