Answer:
r ≥ -9
Step-by-step explanation:

Answer:
i don't get that ether
Step-by-step explanation:
Answer:
Multiply the top equation by 3
Step-by-step explanation:
Answer:
Option A.
Step-by-step explanation:
we know that
The circle 1 and circle 2 have the same center
The ratio of its radius is equal to the scale factor
The scale factor is equal to

<em>That means</em>
The radius of circle 1 is 4 times the radius of circle 2
therefore
Circle 1 is a dilation of circle 2 with a scale factor of 4