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tensa zangetsu [6.8K]
3 years ago
12

An ellipse has a center at the origin, a vertex along the major axis at (20, 0), and a focus at (16, 0). the equation of the ell

ipse is in the form below.what is the value of b in the equation? (enter a positive number.)b =
Mathematics
2 answers:
olga_2 [115]3 years ago
5 0
If the center is at (0, 0) and the vertex is at (20, 0), then the distance, a, is the length from the center to the vertex, 20.  The distance from the center to the focus is c.  The distance from the center to the focus is 16, so c = 16.  The formula we use to find the focus is c^2=a^2-b^2.  We have our c value and our a value, so we will sub in those to find b.  16^2=20^2-b^2 and 256 = 400 - b^2.  -b^2 = -144, so b = 12.  There you go!
larisa86 [58]3 years ago
3 0

Answer:

b = 12

Step-by-step explanation:

just got it right it on edg :)

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Factor completely 8y^3 + 16y^2
Vlad1618 [11]

Answer:

8y^2 (y+2)

Step-by-step explanation:

8y^3 + 16y^2

both terms contain an 8 and a y^2 so we can factor them out

8y^2 (y+2)

3 0
3 years ago
Read 2 more answers
Construct an equilateral triangle of side 7cm and construct circumcircle.
zalisa [80]

Answer:

To do this, all you need is to draw triangle with each side being 7 cm, and a circle that intersects all three of its corners.

Step-by-step explanation:

  1. With a ruler and a pencil, draw a 7cm line.
  2. With a compass set to a radius of 7cm draw an arc centered around the right end of the line.
  3. With the same compass, still at 7cm, draw an arc centered around the left end of the line.
  4. These two arcs will intersect on either side of the line (you only need one side, so you only need a small arc in the right place, roughly where you think the third point if the triangle is.
  5. Where those arcs intersect is the third point on your triangle.  Mark that, and then trace two lines from that point to either end of the line segment you started with.

<em>You now have an equilateral triangle with 7cm sides.  Next you need to draw the circle</em>

  1. Measure the halfway point on two of your three lines.
  2. Draw a line from that each of those halfway points to the opposite corner. The new lines you're drawing will be perpendicular to the edge your measuring against.
  3. You have now drawn two line segments, and they intersect in the center of the circle.  Now take your compass and set its radius to the distance from that center point to one of the three corner points.
  4. Centered on that middle point, trace a circle with the selected radius.

And you're done!

6 0
2 years ago
What is the answer ? Please help !!
ch4aika [34]

Answer: p > \frac{3}{7}

Step-by-step explanation:

-21p + 69 > -49p + 81

         -69                -69

-21p > -49p + 12

+49p     +49p

28p > 12   divide both sides by 28

p > 12/28

reduce it  p> 3/7

7 0
3 years ago
What 5x23p9x2 and what is the common number?
loris [4]
Hi There! :)

<span>What 5x23p9x2 and what is the common number?

5</span>×23=115
<span>115</span>×9=1035
<span>1035</span>×2=2070
<span>
Therefore 2070 is the answer
</span>

5 0
3 years ago
How many kilometers are there ??
irinina [24]

Answer:

20

Step-by-step explanation:

1 hour=2 kg

10 hrs=10×2=20

Mark as brainliest please!

5 0
3 years ago
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