Consider the calculation of x - y + (-z) where x and z are positive real numbers an y is a negative real number. Which directions of motion for this calculation?

Is the final answer positive or negative, or undetermined?

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Ответ:

izeahzapata1

03.11.2020

Mathematics

keeping in mind that any line parallel to MN will have the same exact slope as MN's.

$\bf (\stackrel{x_1}{2}~,~\stackrel{y_1}{6})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{0}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{0-6}{4-2}\implies \cfrac{-6}{2}\implies \cfrac{-3}{1}\implies -3~~\checkmark \\\\[-0.35em] ~\dotfill$

$\bf (\stackrel{x_1}{8}~,~\stackrel{y_1}{1})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{10}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{10-1}{5-8}\implies \cfrac{9}{-3}\implies \cfrac{3}{-1}\implies -3~~\checkmark$

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Consider the calculation of x - y + (-z) where x and z are positive real numbers an y is a negative real number. Which directions of motion for this calculation? Is the final answer positive or negative, or undetermined?