Sara earns $9 per hour babysitting. She must earn a minimum of $81 next month to attend a concert. If h represents the number of hours Sara babysits, write an inequality to describe the situation.

Nine more than four times a number is the same as one less than twice the number. find the number?

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?