Yvaries directly with x, and y = 15 when x = 3. what is the value of x when y = 4?

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

Someone me i need with this stuff

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges