Mr. finley’s class visited a number of freshwater lakes to learn more about the crocodiles and alligators living in them. the class counted the number of species in each lake as shown in the table. lake crocodiles alligators a 4 5 b 21 35 c 3 9 d 6 16 e 24 30 the relationship between the number of crocodiles and the number of alligators is not proportional across all lakes. only two of the lakes have crocodiles and alligators in the same proportion. which two lakes are they?

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.

For the sequence [tex]a_{n} = 2n/(n+1)[/tex], what is the value of [tex]a_{10}[/tex]

Arectangular courtyard is 12 feet long and 8 feet wide. a tile is 2 feet long and 2 feet wide. how many tiles are needed to cover the courtyard?