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Korolek [52]
2 years ago
15

Which expression has a value of 39?

Mathematics
1 answer:
Ludmilka [50]2 years ago
4 0
I think the answer to this one would be B
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Can u help me solve for this question please
Ymorist [56]

Answer:

48?

Step-by-step explanation:

If x = 30 and y = 36

(Instead of 6 add 8 to 40 to be proportional

7 0
4 years ago
Solve the Differential equation 2(y-4x^2) dx + x dy = 0
padilas [110]

Assume a solution of the form \Psi(x,y)=C. Taking the differential of both sides would give the ODE

\Psi_x\,\mathrm dx+\Psi_y\,\mathrm dy=0

where \Psi_x=2y-8x^2 and \Psi_y=x. The ODE is exact if \Psi_{xy}=\Psi_{yx}. We have

\Psi_{xy}=(2y-8x^2)_y=2

\Psi_{yx}=(x)_x=1

so the ODE is not exact. However, multiplying both sides by x gives

(2xy-8x^3)\,\mathrm dx+x^2\,\mathrm dy=0

and now

(x\Psi_x)_y=(2xy-8x^3)_y=2x

(x\Psi_y)_x=(x^2)_x=2x

so the ODE is now exact.

Now,

\Psi_x=2xy-8x^3\implies \Psi(x,y)=x^2y-2x^4+f(y)

\Psi_y=x^2=x^2+f_y\implies f_y=0\implies f(y)=C

So the ODE has solution

\Psi(x,y)=x^2y-2x^4+C=C

or simply

\boxed{x^2y-2x^4=C}

3 0
4 years ago
Please help to answer the questions from the picture!!!
sergey [27]
A) 13 degrees because it would be 90-77
If two angles are complementary, then the two angles add up to 90 degrees.
If angle A is 77, then the complement would be 90-77 or 13 degrees.

b) The complement of the complement of the angle is the angle itself.
Say the angle A is 30 degrees. It's complement is 90-30 or 60 degrees.
The complement of the 60 degrees is 30 degrees.
So the complement of the complement of the angle would be the angle itself. 

Hope this helps :)
7 0
3 years ago
What is the product (x-3)(2x^2-5x + 1)
Reika [66]
F '(x<span>) = </span>2(3x2<span> + 5) + 6x(</span>2x<span> - </span>1<span>) ... + </span>3), s(x<span>) = </span>x<span> - 4. Use the </span>product<span> rule table. below to get: r'(</span>x) = 20x + 11. s'(x<span>) = </span>1<span> ... f'(</span>x) = (x<span> - 4</span>)(20x + 11) - (5x<span> - </span>2)(2x<span> + </span>3)/(x<span> - 4)</span>2<span>.</span>First, we will distribute 2x<span> to (</span>x<span> + 5), then we will distribute </span>3<span>. ... </span>5x<span>. That is,. multiplying binomials. 6x − </span>x<span>= </span>5x<span>. Example </span>2<span>. Multiply (3x − </span>1)(x<span> + </span>2). Answer. 3x2<span> + </span>5x<span> 


</span>
4 0
3 years ago
A group of people want to buy tickets to a baseball game. At least 18 people need to buy tickets in order to get the group rate.
borishaifa [10]

Answer:

a or b

Step-by-step explanation:

it should be p≥18

greater then or equal to 18. because if you have 18, you can get the group rate and I'd you have more than 18 you can also get the group rate.

4 0
3 years ago
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