There are 24 sixth grafers and 40 seventh graders. mr. chan wants to divide both grades into groups of equal size, with the greatest possible nimber of students in each group, how many students should be in each group?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.