Aball pit has 150 balls in it. the number of red is three times orange and green and blue together is exactly half the number of balls in the pit . what is the probability a ball chosen at random from the pit will be red or orange ?

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab