Systems of Equations.

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Presentation transcript:

Systems of Equations

Solve the following by substitution #1-5, #6-10 elimination (worth 2 points each) y = x + 1 y = 2x -1 y = (1/2)x + 4 2y + 2x = 2 2y = x + 3 x = y x – y = 1 x = (1/2) y + 2 y = 4x – 8 y = 2x + 10 2x + 5y = 17 6x – 5y = -9 7x + 2y = 10 -7x + y = -16 2x – 3y = 61 2x + y = -7 8x + 11y = 20 5x – 11y = -59 2x + 18y = -9 4x + 18y = -27

Sort u choose activity You choose your points. Your goal is to get more points towards your grade Just go in the order of the points Label and copy question Must show all work

1 point 2 point 5 point Value Solve System by Graphing Use Substitution Method Use Elimination 1 point y = -x + 2 y = 2x + 5 --------------------------- y = 3x + 1 y = 3x – 8 y = 6x x + y = 28 y = 2x 5x – y = 30 x + y = 7 x – y = 3 6p – 7q = 28 -6p + 3q = -12 2 point 2y – x = 2 x – 2y = 8 y – 2x = -5 y – x = -3 3x + 1 = y 2x + 3y = 25 3a = 2b – 6 a = b - 1 12n + 3m = 18 5n + 3m = 4 ------------------------------ 3a + 5b = 3 a + 2b = 13 5 point Ann has $20 and plans to save $10 a week. Mike has $100 and plans to save $5 a week. In how many weeks will they have the same amount of money? How much money did they have? One number is 12 more than half another number. The two numbers total 60. Find the numbers. A movie theatre charges $5 for an adult ticket and $2 for a child’s ticket. One Saturday the theatre sold 785 tickets for $3280. How many child’s ticket were sold for the movie that Saturday?