If a number is added to itself and the sum is multiplied by 2 the product is 4

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.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year