Solve the system using a form of technology. Give solutions with values correct to the nearest thousandth. 8) 0.6x+4.9y-1/3z=7 5x-18y+10z=-1 3x+ /2y -4.9z = A) {(-7.733, -5.025, 3.491)} B) {(8.110, 0.749. 2.619)} C) {(3.431, 1.930, 2.606) } D) {(2.084, -1.741, 3.529)} Solve the problem using matrices. 9) A chemist has prepared two acid solutions, one of which is 6% acid by volume, another 10% acid. How many milliliters of each should the chemist mix together to obtain 50 ml of a solution that is 8.16% acid? A) 50 ml of 6%; 50 ml of 10% B) 23 ml of 6%: 27 ml of 10% C) 4.08 ml of 6%; 45.92 ml of 10% D) No solution 10) John has a jarful of quarters and nickels. There are 88 coins in the jar. The value of the coins is $13.80. How many of each type of coin are there? A) 41 quarters; 47 nickels B) 47 quarters; 41 nickels C) 52 quarters : 36 nickels D) 83 quarters; 5 nickels 1 1) Jerry has three pieces of string. The total length is 111 cm. The sum of the two longer pieces is 92 cm. The middle piece is twice as long as the shortest piece. What are the lengths of the three pieces? A) 9.5 cm; 19 cm; 82.5 cm B) 19 cm; 38 cm; 54 cm C) 19 cm: 54 cm; 64 cm D) No solution 12) Ron attends a cocktail party (with his graphing calculator in his pocket). He wants to limit his food intake to 146 g protein, 135 g fat, and 171 g carbohydrate. According to the health-conscious hostess, the marinated mushroom caps have 3 g protein. 5 g fat, and 9 g carbohydrate; the spicy meatballs have 14 g protein, 7 g fat. and 15 g carbohydrate; and the deviled eggs have 13 g protein, 15 g fat, and 6 g carbohydrate. How many of each snack can he eat to obtain his goal? A) 9 mushrooms; 6 meatballs; 5 eggs B) 8 mushrooms: 5 meatballs: 4 eggs C) 5 mushrooms; 4 meatballs; 8 eggs D) 4 mushrooms; 8 meatballs; 5 eggs A nonlinear system is given, along with the graphs of both equations in the system. Determine if the points of intersection specified on the graph are solutions of the system. 13) x2=y-1 y-2x+16 35+ 301 25+ 26) 20- 10+ A) Yes B) No