Chris used 45 feet of fencing to enclose a circular garden.what is the aproximate radius of the garden?
a.) 51.27ft
b.) 14.32ft
c.) 7.16ft
d.) 3.78ft

the image of a triangle after it has been dilated with a center of dilation at the origin has vertices at a'(12, –6) and b' (–24, –12) (c' is unknown).

the initial triangle has vertex b with coordinates (-18,-9).

from these data you can find the factor of dilation:

.

this means that if you have coordinates of point b and multiply them by , you obtain the coordinates of b' or if you have coordinates of point b' and multiply them by , you obtain the coordinates of b.

now the coordinates of a' are (12,-6). when multiplying by , you obtain the coordinates of a(9,-4.5).

answer: correct choice is a(9,-4.5).