Answer: 
Step-by-step explanation:
The equation of the circle in center-radius form is:

Where the point
is the center of the circle and "r" is the radius.
Subtract 56 from both sides of the equation:

Make two groups for variable "x" and variable "y":

Complete the square:
Add
inside the parentheses of "x".
Add
inside the parentheses of "y".
Add
and
to the right side of the equation.
Then:

Rewriting, you get that the equation of the circle in center-radius form is:

You can observe that the radius of the circle is:

Answer:
x = 10
Step-by-step explanation:
2+3+4+5+6 = 20
(20 + x) / 6 = 5
cross-multiply:
20 + x = 30
x = 10
Answer:
when you dont feel like using a word problem u can do a expression instead
Step-by-step explanation:
5x+2<4×+4 this inequality will pay a childs price which is 2 $