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Arada [10]
3 years ago
13

write an equation for an ellipse centered at the origin which has foci at (0,±√14) and co-vertices at (±√2,0)

Mathematics
1 answer:
gregori [183]3 years ago
5 0

Answer:

The answer to your question is   \frac{x^{2} }{2} + \frac{y^{2} }{16} = 1

Step-by-step explanation:

Data

F ( 0, ± √14)

C (±√2, 0)

Process

1.- Calculate c

c is the distance from the center to the foci

c = √14

2.- Calculate b

b is the distance from the center to the co-vertices

b = √2

3.- Calculate a using the Pythagorean theorem

     a² = b² + c²

     a² = (√2)² + (√14)²

     a² = 2 + 14

     a² = 16

     a = 4

4.- We can conclude that it is a vertical ellipse because the foci are in the y- axis and the co-vertices are in the x-axis.

          (x - h)²/b² + (y - k)²/a² = 1

-Substitution

          (x - 0)²/(√2)² + (y - 0)²/4² = 1

- Simplification

          x²/2 + y²/16 = 1

or    \frac{x^{2} }{2} + \frac{y^{2} }{16} = 1

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What is the surface area of a box with a height and width of 5 inches and a length of 8 inches ?
vodomira [7]

Answer:

210 sq in

Step-by-step explanation:

Box dimensions: 5 x 5 x 8

2 faces: 5 x 5 -> 2 * 5 * 5 = 50

4 faces: 5 x 8 -> 4 * 5 * 8 = 160

Total = 50 + 160 = 210 sq in

5 0
3 years ago
The measure of two complementary angles have a ratio of 3:2. What is the measure of the larger angle?
azamat

Answer:

54 degrees

Step-by-step explanation:

Complementary angles add to 90 degrees

3:2

Multiply each by x

3x:2x

Add the angles together and set equal to 90

3x+2x = 90

Combine like terms

5x= 90

Divide each side by 5

5x/5 = 90/x

x =18

The angles are 3x = 3(18) =54

   and 2x = 2(18) = 36

3 0
3 years ago
Find the area of the figure below.
Fudgin [204]

Answer:

Area = 42 in^2

Step-by-step explanation:

here's your solution

=> divide above picture in two parts

=> rectangle and traingle

=> area of rectangle = length* width

=> area of rectangle = (5*6)in.

=> area of rectangle = 30 in^2

=> now, area of traingle = 1/2*base *height

=> area of traingle = 1/2*4*6

=> area of traingle = 12 in^2

=> area of figure = 30 in^2 + 12 in^2

=> Area = 42 in^2

hope it helps

3 0
3 years ago
Read 2 more answers
The probability that a comic book reader in a particular city prefers comics published by Company A is 25%. The probability that
Andrew [12]
We know that 70% of all comic book fans are male, and that 40% of Company A fans are male. 

Since 25% of all comic book fans are company A fans: 
0.4 * 0.25 (meaning 40% of 25%) = 0.1, or 10% of all comic book fans are male company A fans. 

What percentage, then, of male comic book fans are company A fans?
0.1 ÷ 0.7 = 0.142
We divide 10%, the percentage of all comic book fans that are male and company A fans, by the percentage of comic book fans that are male, since we are given that the fan is male. 

Answer is 0.14
6 0
3 years ago
Read 2 more answers
33.) Match the graph with its equation.
Zinaida [17]

Answer:

d.) –6x – 2y = 12

Step-by-step explanation:

The equation of the graph is given by

\frac{x}{a}  +  \frac{y}{b}  = 1

Where a=-2 is the x-intercept and b=-6 is the y-intercept.

Let's substitute these values to obtain:

\frac{x}{ - 2}  +  \frac{y}{ - 6}  = 1

Multiply through by 12

- 6x  - 2y = 12

5 0
3 years ago
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