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Angelina_Jolie [31]
3 years ago
13

Please help me this is for a test. Thank you so much whoever answers this.

Mathematics
1 answer:
Alenkinab [10]3 years ago
5 0

Answer: Pretty sure the answer is 3.

Step-by-step explanation:

\frac{2(4+7)-7}{5}

\frac{2(11)-7}{5}

\frac{22-7}{5}

\frac{15}{5}

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Determine whether or not F is a conservative vector field. If it is, find a function f such that F = ∇f. (If the vector field is
Elis [28]

In order for <em>F</em> to be conservative, there must be a scalar function <em>f</em> such that the gradient of <em>f</em> is equal to <em>F</em>. This means

\dfrac{\partial f}{\partial x}=3x^2-2y^2

\dfrac{\partial f}{\partial y}=4xy+4

Integrate both sides of the first equation with respect to <em>x</em> :

f(x,y)=x^3-2xy^2+g(y)

Differentiate both sides with respect to <em>y</em> :

\dfrac{\partial f}{\partial y}=-4xy+\dfrac{\mathrm dg}{\mathrm dy}=4xy+4\implies\dfrac{\mathrm dg}{\mathrm dy}=8xy+4

But we assume <em>g</em> is a function of <em>y</em>, which means its derivative can't possibly contain <em>x</em>, so there is no scalar function <em>f</em> whose gradient is <em>F</em>. Therefore <em>F</em> is not conservative.

8 0
3 years ago
Solve -9 2/7 - (-10 3/7).<br> A. - 1 1/7<br><br> B. 1 1/7<br><br> C. 19 1/7<br><br> D. 19 5/7
jenyasd209 [6]

Answer:

1 5/7

Step-by-step explanation:

-9 2/7 -(-10 3/7) recall -×- = +

-9 2/7 +10 3/7

1 2+3/7

1 5/7

6 0
3 years ago
What is the slope of the line shown?
Over [174]

Answer:

-2

Step-by-step explanation:

1) Look at the y-intercept. The line crosses the y-axis at (0,7)

Follow it down, it goes down two and over one to directly intersect the grid.

Rise over run = 2/1

2/1 = 2

However, the line is negative, as it's sloping down from the left to the right, making the slope -2

5 0
3 years ago
Jefferson middle school is selling tickets to a choral performance. On the first day of ticket sells they sold 4 adult tickets a
scoundrel [369]

Answer:

Adult is $12 and child is $7

Step-by-step explanation:

Adult=x and Children=y

first day: 4x+1y=55

second: 3x+2y=50

Get one letter the same but opposite

(4x+1y=55) times that by -2

-8x+-2y=110

3x+2y=50

minus all of that u get

-5x=60

divide 60 by 5

x=12

fill in X

3(12)+2y=50

36+2y=50

-36       -36

2y=14

/2    /2

y=7

6 0
3 years ago
Please help with this!<br> What equations are equivalent to 1/3^8
olasank [31]
I don’t know how to sorry
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3 years ago
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