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kozerog [31]
3 years ago
7

Need help i am really confused

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
3 0
Your answer is C.
Once simplified they each have the same product.
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Which of the following letters on the number line could represent the √21 Image result for point on number
marissa [1.9K]

Answer:

4.58257

Step-by-step explanation:

That is the square root of 21, so if there's a point about there, then choose it.

6 0
3 years ago
PLEAZZZZZZEE SOLVE FOR ME find the holes of x^2 +x-12 /x^2-4 thank you so much
kow [346]
Factoring the  top and bottom of the fraction we get

(x + 4)(x - 3
---------------
 (x + 4) (x - 4)
4 0
3 years ago
Find a particular solution to the nonhomogeneous differential equation y'' + 4 y = cos(2x) + sin(2x).
alukav5142 [94]
The characteristic solution follows from solving the characteristic equation,

r^2+4=0\implies r=\pm2i

so that

y_c=C_1\cos2x+C_2\sin2x

A guess for the particular solution may be a\cos2x+b\sin2x, but this is already contained within the characteristic solution. We require a set of linearly independent solutions, so we can look to

y_p=ax\cos2x+bx\sin2x

which has second derivative

{y_p}''=(-4ax+4b)\cos2x+(-4bx-4a)\sin2x

Substituting into the ODE, you have

y''+4y=\cos2x+\sin2x
\implies4b\cos2x-4a\sin2x=\cos2x+\sin2x
\implies\begin{cases}4b=1\\-4a=1\end{cases}\implies a=-\dfrac14,b=\dfrac14

Therefore the particular solution is

y_p=-\dfrac14x\cos2x+\dfrac14x\sin2x

Note that you could have made a more precise guess of

y_p=(a_1x+a_0)\cos2x+(b_1x+b_0)\sin2x

but, of course, any solution of the form a_0\cos2x+b_0\sin2x is already accounted for within y_c.
6 0
3 years ago
Please help me ASAP
lutik1710 [3]

9514 1404 393

Answer:

  30°

Step-by-step explanation:

Consecutive interior angles are supplementary when the lines are parallel:

  2x +4x = 180°

  x = 180°/6

  x = 30°

_____

<em>Comment on units</em>

A lot of times the angles are assumed to be measured in degrees. Using that assumption, x=30 (degrees). When no units are specified, the angle measure defaults to radians. In radians, x = π/6. (We rarely see problems of this nature where the angles are expected to be measured in radians. More often, we see poorly edited questions where angles need to be assumed to be measured in degrees.)

8 0
3 years ago
the distance from the center of a round table top to the edge of the table top is 4 feet what's the area of the table top
jekas [21]
4ft is the radius of the circle (round table)
Use this formula to find the area of the circle:
Area = \pi r²
so 4²
4² = 16
16\pi is your answer <3

7 0
3 years ago
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