Solve for x and y: (x + yi) -(2-1) = 12 +7i

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .