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3 years ago

8

Subsistence farming is the dominant economic activity in which of the following countries?

2 answers:

Gelneren [198K]3 years ago

7 0

Subsistence farming is not used anymore, only occasionally in certain parts of the world but in the 1800's it was used in the U.S. by people who only planted enough to get them by, and if they had the smallest portion left they traded it, typically for alcohol

Sladkaya [172]3 years ago

5 0

Developing countries such as parts of south America, Asia, and Africa

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Let m and c represent constants with m nonzero. What is the equation of the line perpendicular to y=m(x+c) and with the same y-i

nikklg [1K]

Answer:

$y = -\frac{1}{m}x + mc$

Explanation:

Given

$y = m(x + c)$

Required

Determine an equation of a perpendicular line but with the same y intercept

$y = m(x + c)$

Open bracket

$y = mx + mc$

A linear equation is represented with:

$y = ax + b$

Where

$a = slope$

$b = y\ intercept$

By comparison:

$a = m$

$b = mc$

So, the slope of $y = m(x + c)$ is m

Because the new line is perpendicular to $y = m(x + c)$ , the relationship between their slopes is:

$a_2 = -\frac{1}{a_1}$

Where

$a_1 =$ slope of the first equation

$a_2 =$ slope of the second equation

Substitute m for $a_1$ in $a_2 = -\frac{1}{a_1}$

$a_2 = -\frac{1}{m}$

Hence, the slope of the new equation is: $-\frac{1}{m}$

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So, the equation of the new equation is:

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