Answer:
; 
Step-by-step explanation:
I have never done a problem like this, so this is my first time attempting it.
The standard form for the equation of a circle is:

Begin by grouping the 'x' terms and 'y' terms:

Complete the square for the second polynomial:





Do the exact same process with the other polynomial:

Complete the square:





Bring the 121 to the other side to get:


The above expression is the equation of our circle in standard form. It is centered at the coordinates (7, -2) and has a radius of 11 units. The area of a circle if given by:

Yes, we need the sisters age to find it the answer, not trying to be rude we just need the sisters age.
Cross multiplying:-
18*x = 12*30
x = 360 / 18
x = 20 answer
Answer:
C. 3
Step-by-step explanation:
5x - 2 = 13
5x = 15
x = 15 ÷ 3
x = 3