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2 years ago

Add 5 to me then divide by 7 then add 12 then subtract 7 you get 10

Mathematics

1 answer:

mr Goodwill [35]2 years ago

4 0

Answer:

Step-by-step explanation:

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NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW!!! THIS IS NOT A TEST OR AN ASSESSMENT!! Please help me with these math questions

Art [367]

Answer:

See below

Step-by-step explanation:

3. What are two ways that a vector can be represented?

Considering a vector $\vec{v}$ in some vector space $\mathbb R^n$ we have

$\vec{v} = \langle a,b\rangle$

This is the component form. I don't like that way. It is probably used in high school, but

$\vec{v} = \begin{pmatrix} a\\ b\\ \end{pmatrix}$

is preferable because the inner product on $\mathbb R^n$ is defined to be

$\langle a,b\rangle := \sum_{i = 1}^n a_i b_i$

You can also write it using linear form such as $\vec{v} = 2i+2j$

For this question, I think you meant

vectors

$\vec{u_1} = (-8, 12)$

$\vec{u_2} = (13, 15)$

Once

$\cos(\theta)=\dfrac{\vec{u_1} \cdot\vec{u_2}}{||\vec{u_1}||||\vec{u_2}||}$

Considering that the dot product is

$\vec{u_1}\cdot \vec{u_2} = (-8)\cdot 13 + 12\cdot 15 = -104+180= 76$

and the norm of $\vec{u_1}$ is $||\vec{u_1}|| = \sqrt{(-8)^2 + 12^2} = \sqrt{64 + 144}= \sqrt{208}$

and the norm of $\vec{u_2}$ is $||\vec{u_2}|| = \sqrt{13^2 + 15^2} = \sqrt{169 + 225}= \sqrt{394}$

Thus,

$\cos(\theta)=\dfrac{76}{\sqrt{208} \sqrt{394}} = \dfrac{19}{\sqrt{13}\sqrt{394}}=\dfrac{19}{\sqrt{5122}}$

$\therefore \theta = \arccos \left(\dfrac{19}{\sqrt{5122}} \right)$

3 0

2 years ago

5n(3n+8) ..? I don't understand

SSSSS [86.1K]

You have ti distribute the 5n into the brackets.

so then youll have 15n^2 + 40n.

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3 years ago

Can someone help me please

Ivanshal [37]

Answer would be C because a straight line is equal to 180° so if you add up 3x° and 27° it should be equal to 180°

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2 years ago

Are all checking accounts the same at all banks? Explain.

Wittaler [7]

Answer:

Step-by-step explanation: They are not because different banks have different interest rates on accounts, different fees and more

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3 years ago

PLEASE HELP ITS URGENT how can you use an equation to make a prediction from a pattern?

allochka39001 [22]

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3 years ago