Explanation:
The standard form of the equation of a circle is ...
(x -h)² +(y -k)² = r² . . . . . . <em>circle centered at (h, k) with radius r</em>
The general form of the equation of a circle will be ...
Ax² +Bxy +Cy² +Dx +Ey +F = 0 . . . . . A = C for a circle
__
The former is converted to the latter by eliminating parentheses, subtracting r² and collecting terms.
x² +y² -2hx -2ky +(h² +k² -r²) = 0
This shows you that ...
A = C = 1
B = 0
D = -2h
E = -2k
F = h² +k² -r²
__
In general form, we like to have the coefficients be mutually prime integers and the leading coefficient be positive. That is not always possible, depending on the circle being represented.
This equation does not have any solution since determinant <0
i.e.,D=b^2-4ac
=2^2-4×1×7
=4-28
=-24
i.e.,is less than 0
Answer:
1470 students do not have a full-time or part-time job
Step-by-step explanation:
We have a relationship between students who have a part-time job and those who do not. The ratio is 7 out of 10 students.
Then we use this relationship as a conversion factor.
If of 10 students, 7 of them have a job, then of 4900 students, how many of them have a job?
students
Finally, those who do not have a job are:

Plug in the to X value in
Answer:
11 years old
Step-by-step explanation:
Jack's father is 3 times older than jack. ATQ, 5 years ago the sum of their ages was 34. So, the present age of Jack is 11 years.
(Hope this helps!! Btw, I am the first to answer.)