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Ch. 3

Ch. 3. Mini Review. Graph the linear system and tell how many solutions it has. If there is exactly one solution, estimate the solution and check it algebraically. y= x + 1 y = -x + 3. The solution is ( 1, 2).

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Ch. 3

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  1. Ch. 3 Mini Review

  2. Graph the linear system and tell how many solutions it has. If there is exactly one solution, estimate the solution and check it algebraically. y= x + 1 y = -x + 3

  3. The solution is(1, 2)

  4. Graph the linear system and tell how many solutions it has. If there is exactly one solution, estimate the solution and check it algebraically. X + 2y = -2 -3x -6y = 6

  5. There are infinitely many solutions

  6. Solve the System x + y = 2 y = 2x + 5

  7. (-1, 3)

  8. Solve the System y – 2x = -5 y – x = -3

  9. (2, -1)

  10. Solve the System 2x – y = -8 2x + y = 4

  11. (-1, 6)

  12. Solve the System x + 4y + z = 12 y – 3z = -7 z = 3

  13. (1, 2, 3)

  14. Solve the System x + y + 2z = 5 x + 2y + z = 8 2x + 3y – z = 1

  15. (-7, 6, 3)

  16. Solve the System 2x – y = 9 5x + 2y = 27

  17. (5, 1)

  18. Solve the System 3x + 5y = 8 4x + 7z = 18 y + z = 3

  19. (1, 1, 2)

  20. Graph the system of linear inequalities y ≤ 2 x > 3

  21. Graph the system of linear inequalities x ≥ 0 y ≥ 0 2x + y ≤ 4

  22. Earning moneyYou work at a grocery store. Your hourly wage is greater after 6:00 p.m. than it is during the day. One week you work 20 daytime hours and 20 evening hours and earn $280. Another week you work 30 day time hours and 12 evening hours and earn a total of $276. What is your daytime rate? What is your evening rate?

  23. daytime = $6 evening = $8

  24. TelethonDuring a recent telethon, people pledged $25 or $50. Twice as many people pledged $25 as $50. Altogether, $18,000 was pledged. How many people pledged $25?

  25. 360

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