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Diano4ka-milaya [45]
3 years ago
6

Please answer the question in the image below ASAP

Mathematics
1 answer:
anastassius [24]3 years ago
4 0

Answer:

<h2>Option A Center: 2,-3 radius =5</h2>

Step-by-step explanation:

(x-h) ^2+(y-k) ^2 =r^2

The above equation is the general standard equation for the circle centered at (h,k) with radius r

Given that the equation of the circle is

(x-2) ^2+(y+3) ^2 =25

Comparing this with the general equation we can get the center and the radius as

(x-h) ^2+(y-k) ^2 =r^2\\(x-(2)) ^2+(y-(-3)) ^2 =5^2

We can now see that

h= 2

k= -3 and

r= 5

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The altitude a ( in feet) of a plane t minutes after lift off is given by a=3400t+600
Julli [10]

Answer:

  6 minutes

Step-by-step explanation:

'a' in the formula represents altitude in feet. You are told the altitude is 21000 feet, so put that into the formula:

   21000 = 3400t +600

You can solve this for t:

  20400 = 3400t . . . . . subtract 600 from both sides

  6 = t . . . . . . . . . . . . . . . divide both sides by 3400

The problem statement tells you that t represents minutes after lift off, so this solution means the altitude is 21000 feet 6 minutes after lift off.

The question is asking for the number of minutes after lift off that the plane reaches an altitude of 21000 feet, so this answers the question directly:

  The plane is at an altitude of 21000 feet 6 minutes after lift off.

4 0
3 years ago
What's the answer to this ?? Need help
Veseljchak [2.6K]
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Arisa [49]

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3 years ago
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zepelin [54]

Answer:

[y]

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Step-by-step explanation:

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Find the global maximum and global minimum values (if they exist) of x 2 + y 2 in the region x + y = 1. If there is no global ma
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Given that x+y=1, we have y=1-x, so that

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Take the derivative and find the critical points of g:

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Take the second derivative and evaluate it at the critical point:

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At the critical point, we get the minimum value g\left(\frac12\right)=f\left(\frac12,\frac12\right)=\frac12.

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3 years ago
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