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maria [59]
3 years ago
11

I am confused help me

Mathematics
2 answers:
bonufazy [111]3 years ago
4 0
2x+3=17
subtract 3 from both sides
2x=14
divide both sides by 2 and get
x=7
victus00 [196]3 years ago
3 0
You need to subtract the 3. when you add a 3 you end up with 6. WHAT YOU DO TO ONE SIDE, YOU MUST DO TO THE OTHER. 
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Let φ(x, y) = arctan (y/x) .
Alexandra [31]

Answer:

a) \large F(x,y)=(-\frac{y}{x^2+y^2},\frac{x}{x^2+y^2})

b) \large \mathbb{R}^2-\{(0,0)\}

c) the points of the form (x, -x) for x≠0

Step-by-step explanation:

a)

If φ(x, y) = arctan (y/x), the vector field F = ∇φ would be

\large F(x,y)=(\frac{\partial \phi}{\partial x},\frac{\partial \phi}{\partial y})

On one hand we have,

\large \frac{\partial \phi}{\partial x}=\frac{\partial arctan(y/x)}{\partial x}=\frac{-y/x^2}{1+(y/x)^2}=-\frac{y/x^2}{1+y^2/x^2}=\\\\=-\frac{y/x^2}{(x^2+y^2)/x^2}=-\frac{y}{x^2+y^2}

On the other hand,

\large \frac{\partial \phi}{\partial y}=\frac{\partial arctan(y/x)}{\partial y}=\frac{1/x}{1+(y/x)^2}=\frac{1/x}{1+y^2/x^2}=\\\\=\frac{1/x}{(x^2+y^2)/x^2}=\frac{x}{x^2+y^2}

So

\large F(x,y)=(-\frac{y}{x^2+y^2},\frac{x}{x^2+y^2})

b)

The domain of definition of F is  

\large \mathbb{R}^2-\{(0,0)\}

i.e., all the plane X-Y except the (0,0)

c)

Here we want to find all the points such that

\large (-\frac{y}{x^2+y^2},\frac{x}{x^2+y^2})=(k,k)

where k is a real number other than 0.

But this means

\large -\frac{y}{x^2+y^2}=\frac{x}{x^2+y^2}\Rightarrow y=-x

So, all the points in the line y = -x except (0,0) are parallel to the vector field F, that is, the points (x, -x) with x≠ 0

8 0
3 years ago
7..4745 x 10 to the 10th power
Ludmilka [50]

Answer:

74,745,000,000

Step-by-step explanation:

First, you take the power and you move the decimal point over that man places:

7.4745 x 10 to the 10th power

Decimal point moves over 10 places to the right

= 74745,000,000

If the power was negative, you would move it left

Hope this helps!

Plz name brainliest if possible!

8 0
3 years ago
Shana lives in a town with a population of 130,000. Standing outside the largest grocery store, Shana surveyed people to find ou
ivann1987 [24]
Around 17,225 cats could be estimated to live in the town
7 0
3 years ago
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Is this function one-to-one? Explain how you determine your answer
Vinil7 [7]
A function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1. Note: y = f(x) is a function if it passes the vertical line test.
7 0
3 years ago
Points J, K and L are distinct points, and JK = KL. Which of these statements must be true?
Hoochie [10]
* J,K,&L are coplanar

* K is the midpoint of JL

* J,K,&L are collinear

* Jk=KL
4 0
3 years ago
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