Q: Carolyn practices the piano for 20 minutes a day and the violin for three times as long. If she practice six days a week, how many minutes does she spend practicing in a month with four weeks?
A: First find Carolyn's total violin practice time by tripling her piano practice time: 20 minutes / day * 3 = 60 minutes / day. Then find the total amount of time she spends practicing each day: 60 minutes / day + 20 minutes / day = 80 minutes / day. Then find the total time she spends practicing each week: 80 minutes / day * 6 days / week = 480 minutes / week. Then find the total time she spends practicing each month: 480 minutes / week * 4 weeks / month = 1920 minutes / month. The answer is 1920.
Question: Lucia is a dancer. She takes 2 hip-hop classes a week, 2 ballet classes a week, and 1 jazz class a week. One hip-hop class costs $10. One ballet class costs $12, and one jazz class costs $8. What is the total cost of Lucia’s dance classes in one week?
Answer: The total cost of the hip - hop classes is 2 * $10 = $20. The total cost of the ballet classes is 2 * $12 = $24. The total cost of the jazz class is 1 * $8 = $8. The total cost of all of Lucia’s dance classes in one week is $20 + $24 + $8 = $52. The answer is 52.
[Question]A Whatsapp group has members sending messages every day sharing about how each one's day was. Last week, 300 messages were sent by the members on Monday, 200 messages on Tuesday, 300 more messages on Wednesday than the previous day, and two times as many messages on Thursday as there were on Wednesday. Calculate the number of messages sent in the Whatsapp group after the four days.
[Answer]The total number of messages sent last week on Monday and Tuesday is 300 + 200 = 500 messages. On Wednesday, the number of messages was 300 more than the previous day, a total of 300 + 200 = 500 messages. In total, in the three days, the number of messages sent is 500 + 500 = 1000 messages,. On Thursday, the number of messages sent was two times the number sent on Wednesday, totaling 2 * 500 = 1000 messages. In the four days. the number of messages sent is 1000 + 1000 = 2000. The answer is 2000.
Q: Daria wants to go to a concert by her favorite band. She wants to buy tickets for her and for three of her friends. One ticket cost is $90. How much money does Daria need to earn if she currently has only $189?
A: Daria wants to buy tickets for four persons, so the cost will be 4 tickets * $90 / ticket = $360. Daria currently has $189, so she needs $360 - $189 = $171 more. The answer is 171.
Question: The number of short students in a class is 2/5 of the total number of students. If there are 90 tall students, and the class has 400 students, calculate the total number of students with average height.
Answer: The number of short students in the class is 2 / 5 * 400 = 160. The total number of short and tall students is 160 + 90 = 250. Since there are 400 students in the class, the number of students with average height is 400 - 250 = 150. The answer is 150.
Q: Since Jason started investing, he has earned the same amount he invested twice over in 5 months. If Jason's investment currently is worth $90, how much has he been earning per month from his investment assuming he has been earning an equal amount of returns each month?
A:
Let's say Jason invested x amount of money. Since Jason started investing, he has earned the same amount he invested twice over in 5 months, meaning he has earned x + 2 * x = $90. This evaluates to 3x = $90. The total amount of money that Jason invested is x = $90 / 3. Jason invested x = $30. The total amount of money that Jason has earned from his investments is $90 - $30 = $60. If he earned an equal amount of money from the investment in five months, his monthly returns is 60 / 5 = $12. The answer is 12.