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zloy xaker [14]
3 years ago
7

Can someone help explain this solution to me?

Mathematics
1 answer:
TiliK225 [7]3 years ago
5 0
Uh, that looks really complicated lol so u don’t think I’d be able to. Sorry ☹️
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PLZ HELP ASAP FEATURES OF A CIRLE FROM EXPANDED EQUATION
Lana71 [14]
First we need to convert the given equation to standard form, only then we can find the center and radius of the circle.

x^{2} + y^{2} +18x+14y+105=0 \\  \\ 
 x^{2} +18x+ y^{2}+14y=-105 \\  \\ 
 x^{2} +2(x)(9)+ y^{2}+2(y)(7)=-105 \\  \\ 
x^{2} +2(x)(9)+ 9^{2} + [y^{2}+2(y)(7)+7^{2}]  =-105+9^{2}+7^{2}  \\  \\ 
 (x+9)^{2}+ (y+7)^{2}=25  


The standard equation of circle is:

(x-a)^{2} + (y-b)^{2}= r^{2}

with center (a,b) and radius = r

Comparing our equation to above equation, we can write

Center of circle is (-9, -7) and radius of the given circle is 5 
8 0
3 years ago
What fraction is shaded and what percentage is shaded
olganol [36]

Answer:

a) 6/9

b) 66.66%

Step-by-step explanation:

a) Total number of the small triangles inside the big triangle=9

and the shades = 6

friction of shaded = 6÷9

b) percentage of shaded = 6÷9 ×100

=66.6666%

4 0
3 years ago
Can someone plz correct me ?
Verizon [17]
I would guess that the answer would be A) likely but it not it would probably be C) certain
5 0
3 years ago
ANSWER PLZ WILL MARK BRAINLIEST!!!!!!
Zielflug [23.3K]

Answer:

3x^2

Step-by-step explanation:

6 0
2 years ago
Hailey received some cash for birthday. She spent $14.48 on a CD and donated $25.00 to charity. She put half of what was left in
DaniilM [7]
Work backwards.

After she put half of what she had left in, she had 17.76.

Multiply by 2:

17.76 * 2 = 35.52

Add 25:

35.52 + 25 = 60.52

Add 14.48:

75

So she received $75 on her birthday.
8 0
3 years ago
Read 2 more answers
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