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3 years ago

I dont really understand this so can someone help me please!

Mathematics

1 answer:

pychu [463]3 years ago

3 0

The area of a circle is pi times the radius squared. the radius of this circle is 16.8cm, which is 282cm when squared. multiplied by pi it becomes 887cm.

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X equals n divided by m-k

AlladinOne [14]

Answer:

x in (-oo:+oo)

x = n/m-k // - n/m-k

k-(n/m)+x = 0

k-(m^-1*n)+x = 0 // - k-(m^-1*n)

x = -(k-(m^-1*n))

x = m^-1*n-k

Step-by-step explanation:

5 0

2 years ago

What is Perpendicular to 5x-3y=30 and passing through (-2,7)

alisha [4.7K]

$k:y=m_1x+b_1;\ l:y=m_2x+b_2\\\\k\ \perp\ l\iff m_1\cdot m_2=-1\\\\k\ ||\ l\iff m_1=m_2$

We have:

$k:5x-3y=30\ \ \ \ |-5x\\\\-3y=-5x+30\ \ \ \ |:(-3)\\\\y=\dfrac{5}{3}x-10\to m_1=\dfrac{5}{3}\\\\l:y=m_2x+b\\\\k\ \perp l\Rightarrow \dfrac{5}{3}m_2=-1\ \ \ \ |\cdot\dfrac{3}{5}\\\\m_2=-\dfrac{3}{5}$

$l:y=-\dfrac{3}{5}x+b$

The line l is passing through (-2, 7). Substitute the coordinates of the point to the equation of a line l:

$7=-\dfrac{3}{5}\cdot(-2)+b\\\\\dfrac{6}{5}+b=7\ \ \ \ |-\dfrac{6}{5}\\\\b=\dfrac{35}{5}-\dfrac{6}{5}\\\\b=\dfrac{29}{5}$

$l:y=-\dfrac{3}{5}x+\dfrac{29}{5}\ \ \ \ |\cdot5\\\\5y=-3x+29\ \ \ \ |+3x\\\\3x+5y=29$

<h2>Answer: 3x + 5y = 29</h2>

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3 years ago

What is a negative minus a negative

jolli1 [7]

Step-by-step explanation:

a negative it's like adding them together

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2 years ago

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Evaluate each expression if a=4, b=6 and c=3<br><br> 5b-6c

iragen [17]

Answer:

it is 12

Step-by-step explanation:

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3 years ago

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Please help me get the right answer urgently. And I’ll give you Brainliest in seconds.

inn [45]

Answer: i dont know im just a furry im not that smart

Step-by-step explanation: i know laugh at my make fun of me i was bullied for my whole life it started when i was in preschool but now im in 12 grade and i stil have been bullied so i dont care im just a fool of myself

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3 years ago