consider the dilation.
pre-image: a(−1, 3)a(−1, 3) , b(2, 1)b(2, 1) , and c(4, −3)c(4, −3)
image: a′(−2, 6)a′(−2, 6) , b′(4, 2)b′(4, 2) , and c′(8, −6)c′(8, −6)
is the dilation an expansion or contraction? what is the scale factor?

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?