Cid owns a mechanic shop, he charges $20 for an oil change, $30 for a repair, and $5 for a car wash. How much money did he earn if he changed the oil of 5 cars, repaired 10 cars, and washed 15 cars? Give the rationale and then the answer.
Let's think step by step. The money he earned from an oil change is $20 x 5 = $ 100. The money he earned from the repair is $30 x 10 = $300. The money he earned from the car wash is $15 x 5 = $75. Therefore, Cid earned a total of $100 + $300 + $75 = $475.. The answer is: 475.

Pauly is making omelets for his family. There are three dozen eggs, and he plans to use them all. Each omelet requires 4 eggs. Including himself, there are 3 people. How many omelets does each person get? Give the rationale and then the answer.
Let's think step by step. He has 36 eggs because 3 x 12 = 36. He can make 9 omelets because 36 / 4 = 9. Each person gets 3 omelets because 9 / 3 = 3.. The answer is: 3.

Amoli and Anayet must travel 369 miles together. Amoli drove 42 miles an hour for 3 hours and Anayet drove at 61 miles an hour for 2 hours. How many miles do they still need to travel? Give the rationale and then the answer.
Let's think step by step. Amoli = 42 * 3 = 126 miles. Anayet = 61 * 2 = 122. Together = 126 + 122 = 248 miles. 369 - 248 = 121 miles. They still have 121 miles to travel.. The answer is: 121.