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2 years ago

Can someone help I am really confused 15 points + brainliest

Mathematics

1 answer:

maksim [4K]2 years ago

6 0

Answer:

Step-by-step explanation:

you can easly understand the question by read the question again and again.

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Help please, I’m way too stressed and can’t remember any math:((

Leviafan [203]

Answer:

its 400 cuz 0.1 is tenth

Step-by-step explanation:

6 0

2 years ago

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Find the exact value of tan (arcsin (two fifths)). For full credit, explain your reasoning.

Hitman42 [59]

$\bf sin^{-1}(some\ value)=\theta \impliedby \textit{this simply means}
\\\\\\
sin(\theta )=some\ value\qquad \textit{now, also bear in mind that}
\\\\\\
sin(\theta)=\cfrac{opposite}{hypotenuse}\qquad 
\qquad 
% tangent
tan(\theta)=\cfrac{opposite}{adjacent}\\\\
-------------------------------\\\\$

$\bf sin^{-1}\left( \frac{2}{5} \right)=\theta \impliedby \textit{this simply means that}
\\\\\\
sin(\theta )=\cfrac{2}{5}\cfrac{\leftarrow opposite}{\leftarrow hypotenuse}\qquad \textit{now let's find the adjacent side}
\\\\\\
\textit{using the pythagorean theorem}\\\\
c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a\qquad 
\begin{cases}
c=hypotenuse\\
a=adjacent\\
b=opposite\\
\end{cases}$

$\bf \pm \sqrt{5^2-2^2}=a\implies \pm\sqrt{21}=a
\\\\\\
\textit{we don't know if it's +/-, so we'll assume is the + one}\quad \sqrt{21}=a\\\\
-------------------------------\\\\
tan(\theta)=\cfrac{opposite}{adjacent}\qquad \qquad tan(\theta)=\cfrac{2}{\sqrt{21}}
\\\\\\
\textit{and now, let's rationalize the denominator}
\\\\\\
\cfrac{2}{\sqrt{21}}\cdot \cfrac{\sqrt{21}}{\sqrt{21}}\implies \cfrac{2\sqrt{21}}{(\sqrt{21})^2}\implies \cfrac{2\sqrt{21}}{21}
$

7 0

2 years ago

What is the probability of picking an "s" in the word "footloose"?

lbvjy [14]

1/9 or 0.1111111...%

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3 years ago

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What is the energy of an object has due to it’s motion is called wat

Snowcat [4.5K]

Answer:

The correct answer is Kinetic Energy

Step-by-step explanation:

From conservation of energy a body at rest posses energy called Potential Energy under which it acquired at particular position of the body i.e at rest

Then as soon body starts moving with a certain speed "v" there is conservation of energy from Potential energy to Kinetic energy given as product of a half with mass of the body and square of its velocity.

In formular K.E= 1/2mv^2 where m stands for mass of the body and v is the speed of the body.

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2 years ago

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Please help me anyone, please

iVinArrow [24]

Answer:

Step-by-step explanation:

Chaz is 3 years younger than 4 times the age of his nephew

n is the age of the nephew.

4 times the age of the nephew.

So you now have 4n.

Now you gotta subtract 3 from 4n which gets you to choice C.

4n - 3

7 0

2 years ago