Tessera has a volleyball game at 7: 00 p. m. she needs to be there 20 minutes early to warm up for the game
and it takes her 45 minutes to get to the gym. what time should she leave her house.

Since it starts at 7pm and she needs to be there 20 mins early, that means she needs to be there by 6:40pm. There are 60mins in an hour and 60-20=40.

Since it takes her 45 mins to get to the gym, she needs to leave 45 mins earlier than 6:40pm so that is 5:55pm. 6:40 - 45 = 5:45

So she should leave her house no later than 5:55pm