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Anestetic [448]
3 years ago
14

Which of the following equations is used to find the value of c (the distance to the foci) for an ellipse? 

Mathematics
1 answer:
Reika [66]3 years ago
4 0

The equation of ellipse:

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

The formula of c (the distance to the foci)

c^2=a^2-b^2\qquad|\text{add}\ b^2\ \text{to the both sides}\\\\c^2+b^2=a^2

<h3>Answer: c² + b² = a²</h3>
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Please help!!! Will mark brainliest!
Ksenya-84 [330]

Answer:

4, 11

Step-by-step explanation:

Q# 13 :

Let the first number be 'x'

the 2nd number would be ' x + 7'

x + x + 7 = 15

2x= 15-7

x= 8/2

x= 4

2nd number: x + 7

                    = 4+7

                    = 11

5 0
3 years ago
A rectangular playground is 65m long and 30 m wide. A pathway of 1.5 m width goes all around, outside it. Find the area of the p
BabaBlast [244]

Answer:

97.5 m^2

Step-by-step explanation:

Given data

Length = 65m

Width= 30m

We are told that the width of the path= 1.5m

Hence the area of the path is

=65*1.5

=97.5 m^2

4 0
3 years ago
If John ran a 5-kilometer marathon how long was that in meters?
kolbaska11 [484]
5000 meters in 5 kilometers I'm pretty sure
3 0
4 years ago
Read 2 more answers
Due today plz help me i am very desprate don’t just answer for points
STALIN [3.7K]
1) 43
2) 84
3) 80
4) 53
5) 58
6) 47
hope this helps
8 0
3 years ago
What’s the derivative of the function: A) f(x)= 1/x , in point 2. B) f(x)= 5x^2 , in point 3
bija089 [108]

Using the power rule, the derivatives are given as follows:

a) f^{\prime}(2) = -\frac{1}{4}.

b) f^{\prime}(3) = 30.

<h3>What is the power rule for a derivative?</h3>

Suppose we have a power function given by:

f(x) = x^n

The derivative of the function is given by:

f^{\prime}(x) = n \times x^{n-1}

Item a:

The function is:

f(x) = \frac{1}{x} = x^{-1}

Then the derivative is:

f^{\prime}(x) = -x^{-2} = -\frac{1}{x^2}

When x = 2, the derivative is:

f^{\prime}(2) = -\frac{1}{4}

Item b:

The function is:

f(x) = 5x^2

Then the derivative is:

f^{\prime}(x) = 10x

When x = 3, the derivative is:

f^{\prime}(3) = 30

More can be learned about derivatives at brainly.com/question/2256078

#SPJ1

5 0
2 years ago
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