Cominny S Geometry QTR 4(SY 2019-20) UPDATED
Writing an Equation with a Given Center and Radius
Which equation represents a circle with a center at (2, -8) and a radius of 11?
(x - 3)2 + (y + 2)2 = 11
(x - 2)2 + (y + 8)2 = 121
(x + 2)2 + (y - 3)2 = 11
(X + 8)2 + (y + 2)2 = 121

answer:   14

step-by-step explanation:          

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step-by-step explanation:

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step-by-step explanation:

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

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3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !