Answer this question:Alina and her best friend Lucia like to chat a lot. On a particular day, Alina sent 20 fewer messages than her friend Lucia, who sent 120 messages. The next day, Lucia sent 1/3 of the messages she sent the previous day, while Alina doubled the messages she sent on the first day. If they sent the same number of messages on the third day as the first day, what is the total number of messages they sent in those three days?
On the first day, Alina sent 120 - 20 = 100 messages. The total number for the first day is 100 + 120 = 220 messages. On the second day, Lucia sent 1 / 3 * 120 = 40 messages. Alina sent 100 * 2 = 200 messages on the second day. The total for the second day is 40 + 200 = 240 messages. For the three days, they sent 220 + 220 + 240 = 680 messages.
The answer is 680.

Answer this question:There are 400 students in a local high school. 50 percent are freshmen or sophomores. 1/5 of freshmen and sophomores own a pet. How many freshmen and sophomores do not own a pet?
Freshman / Sophomores:400(.50) = 200 students. Have pets:200 / 5 = 40 students. 200 - 40 = 160 do not have pets.
The answer is 160.

Answer this question:Benjamin collects 6 dozen eggs a day. Carla collects 3 times the number of eggs that Benjamin collects. Trisha collects 4 dozen less than Benjamin. How many dozen eggs do the three collect total?
Carla:3(6) = 18 dozen eggs. Trisha: 6 - 4 = 2 dozen eggs. Total: 6 + 18 + 2 = 26 dozen eggs.
The answer is 26.

Answer this question:A convenience store sold 100 bags of chips in a month. In the first week, 15 bags of chips were sold. In the second week, thrice as many bags of chips were sold. There was an equal number of chips sold in the third and fourth week. How many chips was each sold in the third and fourth week?
In the second week, 15 x 3 = 45 bags of chips were sold. So there was a total of 45 + 15 = 60 bags of chips sold on the first and second week. Thus, a total of 100 - 60 = 40 bags of chips were sold on the third and fourth week. Therefore, 40 / 2 = 20 bags of chips were each sold on the third and fourth week.
The answer is 20.