The length of a rectangular birthday party invitation is 1 inch less than twice its width. The area of the invitation is 15 square inches.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?