please help....There are 42 boys and girls participating in an essay-writing competition. Of the competitors, 21 are in seventh grade, 14 are in eighth grade, and 7 are in ninth grade. What is the probability of an eighth grader winning the competition? Which simulation(s) can be used to represent this situation?1.The probability is 1/3 . Simulate this situation by rolling a 6-sided die, with odd numbers representing seventh graders and even numbers representing eighth graders.2. The probability is 1/6 . Simulate this situation by picking a card from a deck of cards, with hearts representing seventh graders, diamonds representing eighth graders, and spades representing ninth graders.3. The probability is 1/3 . Simulate this situation by spinning a spinner with six equal sections, with one section representing ninth graders, two sections representing eighth graders, and three sections representing seventh graders.4. The probability is 1/6. Simulate this situation by using a number generator with numbers from 1 to 6, with 1 through 3 representing seventh graders, 4 and 5 representing eighth graders, and 6 representing ninth graders.

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general 8 months ago 8885

1. Solve the system. {j+k=3j−k=7{j+k=3j−k=7 Use the substitution method. The solution is (5, −2)(5, −2). There is no solution. The solution is (8, 1)(8, 1) There are an infinite number of solutions. 2.Solve the system of equations. {y=2x−64x−2y=14{y=2x−64x−2y=14 Use the substitution method. The solution is (4, 14)(4, 14). The solution is (14, 4)(14, 4). There is no solution. There are an infinite number of solutions. 3. Solve the system of equations. {y=x−82x+3y=1{y=x−82x+3y=1 Use the substitution method. (2, −6)(2, −6) (4, −4)(4, −4) (0, −8)(0, −8) (5, −3) 4. What is the y

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general 8 months ago 6139