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Zolol [24]
3 years ago
15

Which conic section does the equation below describe?

Mathematics
1 answer:
Rus_ich [418]3 years ago
5 0

Answer: Option C. Ellipse

Step-by-step explanation:

The general equation of an ellipse has the following form:

\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2} =1

Where the point (h, k) is the center of the ellipse

In this case we have the equation

\frac{(x-9)^2}{4} + \frac{(y+2)^2}{25} =1

Note that its shape matches that of a ellipse with center (9, -2)

a=\sqrt{4} \\a=2\\\\\\b=\sqrt{25}\\b=5

Therefore the answer is the obtion C

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vladimir1956 [14]

Answer:

289\ ft^{2}

Step-by-step explanation:

we know that

To find the area of the backyard that is not covered  by the hot tub and fire pit subtract the area of the hot tub and the area of the fire pit from the total area of the square backyard

so

A=20^{2}-(6)(8)-(7)(9)\\A=400-48-63\\ \\A=289\ ft^{2}

4 0
3 years ago
What percent of 78 = 39?
S_A_V [24]
39/78 = .5 = 50%
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3 0
3 years ago
8/f = 56/105 what is f?
svetlana [45]
8/15 = 56/105

This may be solved using proportion.
a/b = c/d
ad = bc   where cross products are equal.

a = 8
b = f
c  = 56
d = 105

ad = bc
8*105 = f*56
840 = 56f
840/56 = 56f/56
f = 15

56 ÷ 7 = 8
105 ÷ 7 = 15
6 0
3 years ago
Read 2 more answers
A computer processes information in nanoseconds. A nanosecond is one-billionth of a second. Write this number as a decimal.
Archy [21]

Answer:

0.000000001

Step-by-step explanation:

Let's convert this :

0.000000001

  tHT      M    B

t=tenths

H=Hundredths

T=Thousandths

M=millionths

B=Billionths

7 0
2 years ago
in one day a movie rented out 35 comedies. If the ratio of comedies rented action movies rented was 5:2 how many action movies w
aksik [14]
14 35/7 equals 5 so 7x2 equals 14
7 0
2 years ago
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