Abag contains 2 white marbles and 7 purple marbles. two marbles are drawn at random. one marble is drawn and not replaced. then a second marble is drawn. what is the probability of selecting a purple marble and then a white marble? what is the probability of selecting two white marbles? is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? show your work.

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a. the profit when the unit price is equal to 0b. the unit price(s) when the profit is equal to 0c. the profit when the unit price is greatestd. the unit price(s) when profit is greatest

Which number produces a rationale number when multiplied by 1/5

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?