Answer:

Step-by-step explanation:
we know that
The equation of a circle in standard form is equal to

In this problem we have


substitute


Answer:
See below and image
Step-by-step explanation:
180 + 48 = 228
180 + 55 = 235
3 is to 5 as x is to 20
5 goes into 20 4 times so 3(4) gives you x
and x=12