Determine whether the set forms a group with respect to the given operation. (you may assume the operation is associative.) if the set does not form a group, determine which properties fail. (select all that apply.)
the positive rational numbers; multiplication

How do the graphs of y = 1/x and y=5/x+6 compare?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.