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frez [133]
3 years ago
12

Why is 2 + (−3) equal to −1? (1 point)

Mathematics
2 answers:
KiRa [710]3 years ago
5 0
A) Because it is 3 units to the left of 2 on a horizontal number line<span />
kakasveta [241]3 years ago
3 0

The answer would be because it is 3 units to the left of 2 on a horizontal number line

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The question is how far is Port A from Port by the shortest route?
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Use the distance formula: d² = (x₂ - x₁)² + (y₂ - y₁)²

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Find an equation to the line perpendicular to 4x + 36y =80 an goes through the point (3,6) write answer in form y= Mx+b
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Answer:

\textbf{y = 9x + 21 }\\

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\textup{Given equation is: $4x + 36y = 80  $}\\\textup{This can be written in the form of $y = mx + a$ as follows}\\$ 36y = -4x + 80 $\\$ \implies y = \frac{80}{36} - \frac{4}{36}x $\\$ \implies y = \frac{-1}{9}x + \frac{20}{9} $\\\textup{This means that the slope of this line is $m = \frac{-1}{9}$}\\

\textup{Then the slope of the line perpendicular to this line would be \textbf{negative reciprocal of m}.}\\$i.e.,$ \textup{Slope of the perpendicular line would be $m_1 = \frac{-1}{\frac{-1}{9}}$}\\$\implies m_1 = 9$\\

\textup{The perpendicular line passes through the point $(3,6)$}\\\textup{Using the \textbf{point-slope formula}, we get:}\\

$$ y - y_1 = m(x - x_1) $$$ \implies y - 6 = 9(x - 3) $\\\textup{After solving this reduces to $y = 9x + 21$ }

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