2-2: MathXL for School: Practice & Problem Solving
2.2.PS-16
Question Help
Challeng...
Mathematics, 20.11.2020 06:50, santiagobermeo32
2-2: MathXL for School: Practice & Problem Solving
2.2.PS-16
Question Help
Challenge Schools A and B are competing in an academic contest. Correct answers earn 9 points.
Incorrect answers lose 4 points. In the final round, School A gives the same number of correct and
incorrect answers. School B gives no incorrect answers and the same number of correct answers as
School A. School A started the final round with 136 points. School B started with 76. The game ends with
the two schools tied. Let x represent the number of correct answers given by School A in the final round.
Write an equation that models the outcome of the contest. Then find the number of answers that each
school got correct in the final round.
Which equation models the scoring in the final round and the outcome of the contest?
OA. 9x - 4x + 136 = 9x + 76
OB. 9x - 4x - 136 = 9x + 76
OC. 4x - 9x + 136 = 9x + 76
OD. 9x + 4x - 136 = - 9x + 76
Answers: 1
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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.
Answers: 1
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