Two trains leave the station at the same time, one heading west and the other east. The westbound

train travels at 85 miles per hour. The eastbound train travels at 105 miles per hour. How long will it take for the two trains to be 494 miles apart.

At the city museum, child admission is $5.60 and adult admission is $9.40. On Monday, 148 tickets were sold for a total sales of $1030.20. How many adult tickets were sold that day?

An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 60 grams of an alloy that contains 18% copper with 100 grams of pure copper. How many grams of copper are in the resulting mixture? What percentage of the resulting mixture is copper?