Carmen bought a plant that is 4 centimeters tall. each week the plant grows an additional 2 centimeters. write an expression to show the height of the plant after w weeks

The expression is 4+2xw=

Let h represent the height of the plant after a certain amount of weeks
let w represent the number of weeks
h= 4 + 2w

explanation: 4 never changes but the variable which is w will affect the growth- per week, so we use w. If its 3 weeks then you do 4+2(3) and you get 10cm. 

Just tell koda to adjust the number of shapes himself.