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NISA [10]
11 months ago
9

A circle is described by the equation x2 y2 14x 2y 14 = 0. what are the coordinates for the center of the circle and the length

of the radius?
Mathematics
1 answer:
bearhunter [10]11 months ago
6 0

Answer:

length is (-7,-1) and radius is 6

Step-by-step explanation:

We are given the expression of the equation of a circle that is

x2 + y2 + 14x + 2y + 14 = 0.

Using completing the squares:

x2 + y2 + 14x + 2y + 14 = 0(x+7)^2 + (y+1) ^2 = -14 + 49 + 1(x+7)^2 + (y+1) ^2 = 36 center thus is at (-7,-1) and the radius is equal to square root of 36 equal to 6.

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Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rat
PilotLPTM [1.2K]

Answer:

Time required by Machine B to create a widget = 4 hours

Step-by-step explanation:

Time taken by Machine A ( T_{A} ) = 3 hours

Time taken by Machine B ( T_{B} )= x hours

Time taken by both machines by working together = 12 hours

The time required to both machines by  working together to finish a task is given by the formula = \frac{T_{A} {T_{B} } }{T_{A} + T_{B} }

Put the values in above formula we get

⇒ T =  \frac{3 x}{3 + x}

⇒ 12 =  \frac{3 x}{3 + x}

⇒ 36 + 12 x = 3 x

⇒ x = - 4 hours

This is the time required by Machine B to create a widget.

8 0
3 years ago
Help I need an answer ASAP will give brainliest
MrMuchimi
The answer is a=6, b=4, and 0=3 you can always try to find the answer in google though

Hope that helped
6 0
2 years ago
The graph of f(x) = x+ was transformed to create the graph of g(x) = f(x) - 9.
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Answer:

Step-by-step explanation:

A

3 0
2 years ago
Help please and make sure the answer is right! Please :(
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You see how these 2 angles marked are both inside the 2 parallel lines?

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These 2 angles are alternate interior angles and they are equal, I think you can do the last part by yourself.

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