If two cylinders are similar and the ratio between the lengths of the radii is 3: 4 what is the ratio of their surface area

Which of the following points is collinear with (-2,1) and (0,3)

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.