12.02.2020

Which is the equation of a hyperbola with directrices at x = +2 and foci at (5, 0) and (-5, 0)?
Ox?
x?
40
10÷1
Or
10
y?
151
y?
10
10 ÷1
*
O
10
y*
=1

. 18

Step-by-step answer

06.09.2022, solved by verified expert
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The standard form for calculating the equation of a parabola along the x-axis is expressed as:

Which is the equation of a hyperbola with directrices, №15231284, 12.02.2020 00:34 where:

(h, k) is the center

(k±c, h) are the foci

Which is the equation of a hyperbola with directrices, №15231284, 12.02.2020 00:34 is the directrix

From the question given, we can see that foci = (±5, 0)

k±c, h = ±5, 0

k = 0

h = 0

c = 5

From the directrix,

Which is the equation of a hyperbola with directrices, №15231284, 12.02.2020 00:34

Also, we need to know that;

a² + b² = c²

10 + b² = 5²

b² = 25 - 10

b² = 15

Substituting the gotten values into the equation of a hyperbola;

Which is the equation of a hyperbola with directrices, №15231284, 12.02.2020 00:34

This gives the required equation of the hyperbola. 

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Mathematics
Step-by-step answer
P Answered by PhD

y=2x+15

where y=Value of coin

x=Age in years

Value of coin after 19 years=2*19+15

=$53

Therefore, Value after 19 years=$53

Mathematics
Step-by-step answer
P Answered by PhD

Here,

tip=18%of $32

tip=(18/100)*32

=0.18*32

=$5.76

Total payment=32+5.76=$37.76

Mathematics
Step-by-step answer
P Answered by PhD

The answer is in the image 

The answer is in the image 
Mathematics
Step-by-step answer
P Answered by PhD

Area of rectangle= L*b

here,

L=12.4 cm

b= 8.8 cm

A= L*b

= 12.4 * 8.8 = 109.12 cm^2

Mathematics
Step-by-step answer
P Answered by PhD

We can put the numbers in ascending order-

36, 38, 39, 39, 40, 47, 48, 51

Range=max-min

          =51-36

          =15

Mathematics
Step-by-step answer
P Answered by PhD

Decrease in bikes sale = 650 - 572 = 78

%Decrease = (change)/old value * 100

%Decrease in sale = 78/650 * 100 = 12%

Decrease in sale = 12%

Mathematics
Step-by-step answer
P Answered by PhD

Total fabric purchased = 1 1/4 = 5/4

Fabric used = 3/4

Fabric left = 5/4 - 3/4

                 = 2/4

                 =1/2 yard

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