Emily bought a shirt and a coat for $600. What does the shirt cost if it is one-third the price of the coat? Give the rationale and then the answer.
Let's think step by step. Let X be the price of the shirt. The price of the coat is X * 3. The total amount is X + X * 3 = $600. Combining like terms, we get X * 4 = $600. Dividing both sides by 4, we get X = $600 / 4 = $150.. The answer is: 150.

A milk teas shop was able to sell a total of 50 cups of milk tea yesterday. Two-fifths of their sales are winter melon flavor, three-tenths are Okinawa flavor, and the rest are chocolate flavor. How many cups of chocolate-flavored milk tea were they able to sell yesterday? Give the rationale and then the answer.
Let's think step by step. A milk tea shop sold 50 x 2 / 5 = 20 cups of winter melon - flavored milk tea. They sold 50 x 3 / 10 = 15 cups of Okinawa - flavored milk tea. So they sold a total of 20 + 15 = 35 cups of winter melon and Okinawa flavors milk tea. Therefore, they sold 50 - 35 = 15 cups of chocolate - flavored milk tea.. The answer is: 15.

A boy runs 1.5 km in 45 minutes. What is his speed in kilometers per hour? Give the rationale and then the answer.
Let's think step by step. Since 1 hour is equal to 60 minutes, then 45 minutes is equal to 45 / 60 = 0.75 hours. Then, the speed in kilometers per hour is 1.5 km / 0.75 hour = 2 kilometers per hour.. The answer is: 2.