Question

Anna is going to play guitar in her school's annual concert. If she starts by practicing for one hour per day and increases the time by 30 minutes each day, how long will she practice on the seventh day?

Answer 1

First, you would take in that Monday you would start with one hour a day. Then, this is the way I would do it, skip to Wednesday, getting 2 hours now. Skip to Friday to get 3 hours. Then, end with Sunday, getting 4 hours.
So the seventh day would be 4 hours of practice.

Answer 2

To do this just add. So 1 hour on the first day. 1 hour 30 minutes on the second day. 2 hours on the third day. 2 hours 30 minutes on the fourth day. 3 hours on the fifth day. 3 hours 30 minutes on the 6th day, and 4 hours on the 7th day. If they ask for it in minutes it would be 240 minutes.