Question

you spent m minutes studying on Monday. On Tuesday, you studied 15 more minutes than you did on Monday. Wednesday, you studied 30 minutes less than you did on Tuesday. You studied twice as long on Thursday as you did on Monday. On Friday, you studied 20 minutes less than you did on Thursday. Write an expression in simplest form to represent the number of minutes you studied in all.

Answer 1

monday: m
tuesday: m+15
wednesday: (m+15)-30
thursday: 2m
friday: 2m-20

m+(m+15)+[(m+15)-30]+2m+(2m-20)

7m-20