3 years ago

What are the center and radius of the circle defined by the equation x2 + y2 - 6x+By+21=0 ?

Mathematics

1 answer:

podryga [215]3 years ago

5 0

(x-3)2+(y+B2)2+By=-12+B24

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State the place value of:. (i) 8 in 287

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Answer:

Step-by-step explanation:

because 8 is in tens place

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The explicit formula for a sequence is<br> an=−2+3/2(n−1)<br> What is the 21st term of the sequence?

Anni [7]

Step-by-step explanation:

From the given question it appears that (n-1) is in the numerator's place, if it is so, then let us solve it.

$a_n = - 2 + \frac{3}{2}(n - 1) \\ \\ \therefore \: a_{21} = - 2 + \frac{3}{2} (21 - 1) \\ \\ \therefore \: a_{21} = - 2 + \frac{3}{2 } \times \: 20\\ \\ \therefore \: a_{21} = - 2 + 3 \times \: 10 \\ \\ \therefore \: a_{21} = { -2 + 30} \\ \\ \therefore \: a_{21} = 28 \\ \\ \huge \red{ \boxed{\therefore \: a_{21} = 28} } \\ \\$

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3 years ago

True or False: In scientific notation a number is written m X 10^w where m is between 1.000 and 9.999...

Bogdan [553]

Answer: True

Step-by-step explanation:

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Step-by-step explanation:

−

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