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Tamiku [17]
3 years ago
12

the points (4,-4) and (4,-6) lie on a circle with the radius of 1. what is the center point of the circle

Mathematics
1 answer:
ycow [4]3 years ago
7 0
The centre point is given by;
( \frac{ x_{2}+ x_{1}  }{2} , \frac{ y_{2} + x_{1} }{2} )
=(  \frac{4+4)}{2}  + \frac{-4+(-6)}{2} )
=( \frac{8}{2} , \frac{-10}{2} )
=(4, -5)
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Dos motos, A y B, toman la salida en una carrera de 90 km. La moto A realiza el recorrido con una velocidad media inferior en 20
aleksandr82 [10.1K]

Answer:

motorcycle A: 180 km/h

motorcycle B: 200 km/h

Step-by-step explanation:

To solve this question we need to write a system of equations for A and B, using the equation:

distance = speed * time

The speed of A is 20 less than the speed of B, so:

speedA = speedB - 20

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timeA = timeB + 0.05

Then, using the distance equation, we have that:

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using this timeB in the distance equation, we have:

90 = speedB * (speedB - 20)/400

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