Derek, Aaron and Matteo are in the same math class. Their math teacher Mr. C gave them the following expression 7(2+3x) +4x. Mr. C asked his students to create an equivalent expression. Here are the expression his students created Derek created the expression 14 +7x Aaron created 14 + 21x + 28x Matteo created the expression 9 + 7x Create your own expression that is equivalent to 7(2 + 3x) + 4x and determine if any of the expressions created by the boys are correct. If not state who is wrong and what was their mistake.

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.