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4 years ago

Using the right triangle below, find the cosine of angle A.

Mathematics

1 answer:

Inessa05 [86]4 years ago

4 0

Answer:

36.87 degrees

Step-by-step explanation:

Cos A = <u>adjacent</u>

hypothenus

Cos A = 8/10

Cos A = 0.8

angle A= 36.87 degrees

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B.the total charge before applying sales tax

Step-by-step explanation:

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3 years ago

PLS HELP ME ASAP WITH THIS! (LOTS OF POINTS!) (show work OR explain)

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3 years ago

Find the measurement of angle 4 when angle 3=7x and 5=3x

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3 years ago

There are 1000 workers in factories each worker works 30 hours a week is paid $10 and 50 cent an hour how much is the company pa

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Step-by-step explanation:

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3 years ago

Write the equation of the line parallel to 4x-5y=2 and passing through point (0,0)

kotykmax [81]

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

We have:

$4x-5y=2\ \ \ \ |-4x\\\\-5y=-4x+2\ \ \ \ |:(-5)\\\\y=\dfrac{4}{5}x-\dfrac{2}{5}\to m_1=\dfrac{4}{5}\\\\l:y=m_2x+b\\\\k\ \prep\ l\Rightarrow\dfrac{4}{5}m_2=-1\ \ \ \ |\cdot\dfrac{5}{4}\\\\m_2=-\dfrac{5}{4}$

$l:y=-\dfrac{5}{4}x+b$

The line l is passing through point (0, 0). Substitute the coordinates of the point to the equation of a line l:

$0=-\dfrac{5}{4}\cdot0+b\to b=0$

$y=-\dfrac{5}{4}x\ \ \ \ |\cdot4\\\\4y=-5x\ \ \ \ |+5x\\\\5x+4y=0$

<h2>Answer: 5x + 4y = 0</h2>

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3 years ago