Which pair of number is relative prime 7 and 42 16 and 39 66 and 77 90 and 891

1 answer:

4 0

The relative prime pair is 16 and 39.

This is because between the two numbers their greatest common factor is 1.

Factors of 16 are 1, 2, 4, 8, 16
Factors of 39 are 1, 3, 13, 39,

The rest of the pairs have more common factors than 1.

relative prime are also called coprime or strangers.

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Which equation represents the circle described?

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${(x - 4)}^{2} + {(y - 3)}^{2} = {2}^{2}$

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The equation of the circle with radius r and centre (a,b) is given by

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The radius is

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${(x - 4)}^{2} + {(y - 3)}^{2} = 1$

The centre of this circle is (4,3)

Hence the center of the circle whose equation we want to find is also (4,3).

With this center and radius 2, the required equation is,

${(x - 4)}^{2} + {(y - 3)}^{2} = {2}^{2}$

Therefore the correct answer is C.

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Step-by-step explanation: