What is the opposite of the opposite of a number

Juan has invested $3500 in a stock transaction. He later sold the stock and received $4553.50. What was Juan's return on investment (ROI) ? A.) about 23.1% B.) about 130% C.) about 76.9% D.) about 30.1%

The power P required to do a fixed amount of work varies inversely as the time t. If a power of 15 J/h is required to do a fixed amount of work in 2 hours, what is the power required to do the same work in 1 hour?

The rectangle is divided into three squares. if the total area is 225 square inches, find s to the nearest tenth.

What is the difference between x-12=y and y=x-12?

3 (5-9b) + 11=-244 solve for b

Is 0.2222 ... a rational number

Chef alonso wants each serving of the dish to include 1/2 pound of chicken. how many 1/2 pound servongs does this recipe make?

Jun used 3 milliliters, or 90%, of his favorite bottle of hot sauce.

What is 0.012 in precentage

The imaginary monster Dracula is 574 years old, according to legend. Since that very first birthday long ago, when he happily blew out 1 candle on a cake decorated with drippy red frosting, how many birthday candles has he blown out in his whole