Cory has 15 die-cast cars in his collection. each year his collection increases by 20%. roger has 40 cars in his collection. each year he collects 1 additional car.
part a: write functions to represent cory and roger's collections throughout the years.
part b: how many cars does cory have after 6 years? how many does roger have after the same number of years?
part c: after approximately how many years is the number of cars that cory and roger have the same? justify your answer mathematically.

Solve the system of equations. y= 2x y= x^2 - 15

What’s -11-33k and factor each expression completely

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.