Use a calculator to evaluate cot pi/5

1 answer:

6 0

It is about 1.37638192.
The cotangent is just one divided by the tangent. So, find the tangent of pi/5 = 0.726542528, then divide 1 by that number.

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Can Somebody please help me?

8090 [49]

I think it’s 3 out of 5

Because 20-8 is 12
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12/20 simply to 3/5
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7 0

3 years ago

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Solve for x. 3(3x - 1) + 2(3 - x) = 0

olganol [36]

Use distributive property to get rid of the parenthesis.....

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3 years ago

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What is the equation of a line with points -3,-11 and 2,4?

const2013 [10]

Answer:

y=3x-2

Step-by-step explanation:

$\frac{4-(-11)}{2-(-3)} =\frac{15}{5} =3$

m=3 so using point-slope intercept form

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5 0

3 years ago

Solve the system by substitution. y = -4x 23 - 5y = 44

spin [16.1K]

<h3>Explanation</h3>

Given the system of equations.

$\begin{cases} y = - 4x \\ 23 - 5y = 44 \end{cases}$

Substitute y = -4x in the second equation.

$23 - 5( - 4x) = 44 \\ 23 + 20x = 44 \\ 20x = 44 - 23 \\ 20x = 21 \\ x = \frac{21}{20}$

Substitute the value of x in any given equations. I will substitute the value of x in the first equation.

$y = - 4x \Longrightarrow y = - 4( \frac{21}{20} ) \\ y = \cancel{ - 4}( \frac{21}{ \cancel{20}} ) \Longrightarrow y = - \frac{21}{5} \\ y = - \frac{21}{5}$

Answer Check by substituting both values in two equations.

First Equation

$y = - 4x \Longrightarrow - \frac{21}{5} = - 4( \frac{21}{20} ) \\ - \frac{21}{5} = \cancel{ - 4}( \frac{21}{ \cancel{20}} ) \\ - \frac{21}{5} = - \frac{21}{5} \: \: \: \checkmark$