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WARRIOR [948]
3 years ago
9

6. x^9y^-4/x^2 simplify

Mathematics
1 answer:
ivann1987 [24]3 years ago
4 0

Answer:

x^7 / y^4

Step-by-step explanation:

Please enclose a negative exponent inside parentheses:

x^9y^(-4)/x^2

Rewrite this in the form

 numerator

----------------------

 denominator

                x^9 *

We get:  ------------ divided by x^2

                y^4

                                                                        x^7

Since x^9 / x^2 = x^7, our final answer is    --------

                                                                         y^4

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An equation of an ellipse is given. x2 16 + y2 25 = 1 (a) Find the vertices, foci, and eccentricity of the ellipse. vertex (x, y
eimsori [14]

Answer:

(a)

  • The vertices are at (0,-5) and (0,5).
  • The coordinates of the foci are (0,-3) and (0,3).
  • Eccentricity=3/5

(b)Length of the major axis=10

Step-by-step explanation:

When the major axis of an ellipse is parallel to the y-axis.The standard form of the equation of an ellipse is given as:

\dfrac{x^2}{b^2}+\dfrac{y^2}{a^2}=1

Given the equation:

\dfrac{x^2}{16}+\dfrac{y^2}{25}=1

(I)The coordinates of the vertices are (0, \pm a)

a^2=25\\a^2=5^2\\a=5

Therefore, the vertices are at (0,-5) and (0,5).

(II)The coordinates of the foci are (0, \pm c)$ where c^2=a^2-b^2

c^2=a^2-b^2\\c^2=25-16\\c^2=9\\c=3

The coordinates of the foci are (0,-3) and (0,3).

(III)Eccentricity

This is the ratio of the distance c between the center of the ellipse and each focus to the length of the semi major axis.

Simply put, Eccentricity =c/a

Eccentricity=3/5

(b)Length of the major axis

The length of the major axis=2a

=2(5)=10.

4 0
3 years ago
Plz help me on this
natulia [17]
You set them both equal to 180 and solve for x so your answer will be 140
3 0
3 years ago
How to solve this problem <br> 19/11÷4 5/11
mihalych1998 [28]
It will be .422222222 because if you divide the to fraction first then you will get the different numbers and then you will divide them to getter and there you have your answer.422222222
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3 years ago
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FromTheMoon [43]
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3 years ago
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ohaa [14]
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Simply get j by itself by adding 3 to both sides.
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3 years ago
Read 2 more answers
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