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dangina [55]
3 years ago
14

Use complete sentences to describe how a parabola is defined based on distances.

Mathematics
2 answers:
raketka [301]3 years ago
4 0

Answer:

Definition of Parabola:

      A Parabola is the set of all points such that ,distance of all that point from  a fixed point called Focus is equal to distance of these points from the fixed line called Directrix are same.

→A parabola in two dimensional plane ,contains two variable, the highest degree  of one variable being 2.

→General equation of parabola are

1. (y-k)^2=\pm4 a(x-h)\\\\2. (x-b)^2=\pm4 a(y-k)

DENIUS [597]3 years ago
3 0
The set of all points in a plane that are the same distance from a given point, called the focus, and a given nline, called the directrix.
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Which equation can be used to describe the direct variation function between E, the total earnings in dollars, and h, the number
kipiarov [429]

Let us take a sharp point for the graph.

In 4 hours total earning is $30.

Therefore, earnings per hours would be 30/4 = $7.5 per hour.

Are given direct variation between Total earnings(E) and Number of hours worked(h).

So, we can setup a direct variation as

Total earnings = Earning each hour * Number of hours.

Therefore, direct variation function would be

E=7.5*h.

Therefore, the direct variation function between E, the total earnings in dollars, and h, the number of hours worked is E = 7.5h.


8 0
3 years ago
Read 2 more answers
Match the dependent variable to the correct linear function.
jonny [76]

Answer:

W = 5 + 13.50s

Step-by-step explanation:

6 0
3 years ago
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3/4w+8=1/3w-7 find value of w
Anika [276]
3 / 4 w + 8 = 1 / 3 w - 7

Multiply by LCD = 4 ( w + 2 )(3w - 7)

3(3w-7) = 4(w + 2)

3*3w - 3*7 = 4 * w + 4 * 2

9 w - 21 = 4 w + 8

Add 21 to both sides :

9w - 21 + 21 = 4w + 8+ 21

9w = 4w + 29

9w - 4w = 29

5 w = 29

Divide both sides by 5 :

5 w / 5 = 29 / 5

w = 29 / 5

hope this helps!

4 0
3 years ago
Please help! I need these done before 2 pm!
jeyben [28]

Answer:

9. (7a + 6b – 9c) – (3a – 6c)

=7a+6b-9c-3a+6c

=7a-3a+6b-9c+6c

=4a+6b-3c

10. (x2 – 9) – (-2x2 + 5x – 3)

= x^2-9+2x^2-5x+3

=x^2+2x^2-5x-9+3  

=3x^2-5x-6

11. (5 – 6d – d2) – (-4d – d2)

=5-6d- d^2+4d+ d^2

=5-6d+4d-d^2+ d^2

=5-2d  

12. (-4x + 7) – (3x – 7)

=-4x+7-3x+7

= -4x-3x+7+7

=-7x+14

13. (4a – 3b) – (5a – 2b)

=4a-3b-5a+2b

=4a-5a-3b+2b

= -a-b

14. (2c + 3d) – (-6d – 5c)

=2c+3d+6d+5c

=2c+5c+3d+6d

=7c+9d

15. (5x2 + 6x – 9) – (x2 – 3x +7)

=5x^2+6x-9- x^2+3x-7

=5x^2- x^2+6x+3x-9-7

=4x^2+9x-16

16. (3y – 6) – (8 – 9y)

=3y-6-8+9y

=3y+9y-6-8

=12y-14

17. (3a2 – 2ab + 3b2) - (-a2 – 5ab + 3b2)

=3a^2-2ab+3b^2+ a^2+5ab-3b^2

=3a^2+ a^2-2ab+5ab+3b^2- 3b^2

=4a^2+3ab  

18. 5c – [8c – (6 – 3c)]

=5c-[8c-6+3c]

=5c-8c+6-3c

=5c-8c-3c+6

= -6c+6

19. 10x + [3x – (5x – 4)]

=10x+[ 3x-5x+4]

=10x+3x-5x+4

=8x+4

20. 3x 2 – [7x- (4x – x2) + 3]

=3x^2-[7x-4x+ x^2+3]

=3x^2-7x+4x- x^2-3

=3x^2-x^2-7x+4x-3

=2x^2-3x-3

21. x2 – [ - 3x+ ( 4 – 7x)]

= x^2-[ -3x+4-7x]

= x^2+3x-4+7x

= x^2+3x+7x-4

= x^2+10x-4

7 0
3 years ago
A runing track is 400m long. Carrie runs wight laps. How far is this in kilometres.
Komok [63]

Multiply length of track by number of times run:

8 x 400 = 3,200 meters

1 km = 1000 meters

3200 meters / 1000 = 3.2 kilometers

Answer: 3.2 kilometers

6 0
3 years ago
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