Amaya scored 20 marks fewer in Maths than she scored in Arts. She also got 10 marks more in Social Studies than she got in Music. If she scored 70 in Music and scored 1/10 less in Maths, what's the total number of marks she scored in all the subjects? Give the rationale and then the answer.
Let's think step by step. The total marks Amaya scored more in Music than in Maths is 1 / 10 * 70 = 7 marks. So the total marks she scored in Maths is 70 - 7 = 63 marks. If she scored 20 marks fewer in Maths than in Arts, then he scored 63 + 20 = 83 in Arts. If she scored 10 marks more in Social Studies than in Music, then she scored 70 + 10 = 80 marks in Social Studies. The total number of marks for all the subjects is 70 + 63 + 83 + 80 = 296 marks.. The answer is: 296.

Olivia pays 4 quarters for chips and 12 quarters for soda. How many dollars does she pay in total? Give the rationale and then the answer.
Let's think step by step. 4 quarters equals to 4 / 4 = $1. 12 quarters equals to 12 / 4 = $3. She pays 1 + 3 = $4 in total.. The answer is: 4.

Mary's sheep can run 12 feet per second, and her sheepdog can run 20 feet per second. A sheep standing 160 feet away from the sheep dog bolts, and the dog runs after it. How many seconds does it take the dog to catch the sheep? Give the rationale and then the answer.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think step by step. First find how much faster the dog is than the sheep: 20 feet / second - 12 feet / second = 8 feet / second. Then divide the distance the dog needs to run by the speed difference: 160 feet / 8 feet / second = 20 seconds.. The answer is: 20.