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3 years ago

What number is 30% of 80

Mathematics

2 answers:

IrinaVladis [17]3 years ago

8 0

The answer for 30% of 80 is “20”

hram777 [196]3 years ago

3 0

Answer:

Step-by-step explanation:

To find the % of something all you have to do is convert 30% to a decimal (.3) and times it by the number you want the percent out of (80) so 80 *.3= 24

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Statistics would not be useful if they were not presented with 100% certainty. T/F

ExtremeBDS [4]

Answer: False

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3 years ago

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Juliette [100K]

Answer:

The value of <em>x </em>is equal to 26 cm.

Step-by-step explanation:

We can use the Pythagorean Theorem to solve this problem.

$a^2+b^2=c^2$

$a=10\\b=24\\c=?$

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3 years ago

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katrin [286]

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3 years ago

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olga nikolaevna [1]

Answer:

Step-by-step explanation:

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5 0

3 years ago

Read 2 more answers

Consider two vectors A and B A=14i and B= -4i+8j

DaniilM [7]

Assuming $\mathbf a,\mathbf b\in\mathbb R^3$ , you have

$\mathbf a\cdot\mathbf b=(14)(-4)+(0)(8)=-56$

so

$((\mathbf a\cdot\mathbf b)\,\mathbf i)\cdot\mathbf a=(-56\,\mathbf i)\cdot(14\,\mathbf i)=(-56)(14)=-784$

Next,

$\mathbf a+\mathbf b=(14\,\mathbf i)+(-4\,\mathbf i+8\,\mathbf j)=10\,\mathbf i+8\,\mathbf j$

Then

$(\mathbf a+\mathbf b)\times\mathbf b=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\10&8&0\\-4&8&0\end{vmatrix}=112\,\mathbf k$

$((\mathbf a+\mathbf b)\times\mathbf b)\times\mathbf k=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\0&0&112\\0&0&1\end{vmatrix}=\mathbf 0$

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3 years ago