Andy has won 12 out of the last 24 tennis matches he has played. if he wants to improve his win record to 70%, which equation could he use to determine how many matches he would have to win in a row? a) 12 + x 24 + x = 0.70 b) 24 + x 12 + x = 0.70 c) 0.70 24 + x = 12 + x d) 0.70 12 + x = 24 + x

The area of a rectangle is 54x^9y^8 square yards. if the length of the rectangle is 6x^3y^4 yards, which expression represents the width of the rectangle in yards

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.