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2 years ago

ILL MARK AS BRAINLESS PLS HELP HURRY

Mathematics

2 answers:

BartSMP [9]2 years ago

8 0

Answer: the first one is 4/3. The second one is 8/20. The third one is 8/8. The fourth one is 7/13!

Step-by-step explanation:

MAXImum [283]2 years ago

3 0

Answer:

First one is 4/3. The second one is 8/20. The third one is 8/8. The fourth one is 7/13!!! :)))

Step-by-step explanation:

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Area <br> help hellllppppp

slega [8]

Answer:

Area = 14¹/16 yd² or 14.0625 yd²

Step-by-step explanation:

2. The figure given is a square having equal sides of 3¾ yd each.

Formula for area of the square = a²

Where,

a = 3¾ yd

Plug in the value into the equation:

Area = (3¾)²

Change to improper fraction

Area = (15/4)²

Area = 225/16

Area = 14¹/16 yd² or 14.0625 yd²

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3 years ago

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erma4kov [3.2K]

Answer:x=4
7.5x=30
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2 years ago

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natima [27]

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2 years ago

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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