Two trains leave stations 456 miles apart at the same time and travel toward each other. one train travels at 85 miles per hour while the other travels at 105 miles per hour. how long will it take for the two trains to meet? do not do any rounding.

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.

Which of the following best describes the delian problem?