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Sauron [17]
3 years ago
14

The value of a algebraic expression y-1 for y = -5is

Mathematics
1 answer:
kifflom [539]3 years ago
4 0
The Answer Is Probably, "-6" .
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What is the radius of a circle whose equation is X^2 plus Y^2 -10X +6 X +18=0?
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EXPLANATION

The given equation is:

{x}^{2}  +  {y}^{2}  - 10y + 6x + 18 = 0

We complete the square to get the expression in standard form:

{x}^{2}  + 6x +  {y}^{2}  - 10y  + 18 = 0

{x}^{2}  + 6x +  9 + {y}^{2}  - 10y  + 25  =  - 18 + 9 + 25

We factor using perfect squares to get:

{(x + 3)}^{2}  +  {(y - 5)}^{2} =  16

This implies that,

{(x + 3)}^{2}  +  {(y - 5)}^{2} =   {4}^{2}

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

The radius is r=4

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