Sum1
2015-11-04 06:47:51
1. What is the value of x in the equation –6 + x = –3? (5 points) –9 –3 3 9 2. How many solutions does the equation –2a + 2a + 7 = 8 have? (5 points) One Two None Infinitely many 3. What is the value of y in the equation 2(2y – 16) = 0? (5 points) 4 6 8 9 4. How many solutions does the equation 5p – 4p – 8 = –2 + 3 have? (5 points) One Two None Infinitely many 5. The steps below show the incomplete solution to find the value of n for the equation 4n – 2n + 4 = –1 + 17: Step 1: 4n – 2n + 4 = –1 + 17 Step 2: 4n – 2n + 4 = 16 Step 3: 2n + 4 = 16 Which of these is most likely the next step? (5 points) 2n = 12 2n = 4 2n = 8 2n = 20 6. What is the value of z in the equation 2(4z – 3 – 1) = 166 – 46? (5 points) 14 15 16 17 7. What is the value of x in the equation –x = 3 – 4x + 6? (5 points) –9 –3 3 9 8. How many solutions does the equation 4n + 6 = 4 + 2 + 4n have? (5 points) Two Many None One 9. Which of these is a simplified form of the equation 6y + 4 = 8 + 2y + 2y? (5 points) 6y = 8 10y = 12 2y = 4 4y = 12 10. The work of a student to solve the equation 3(2x – 4) = 8 + 2x + 6 is shown below: Step 1: 3(2x – 4) = 8 + 2x + 6 Step 2: 5x – 7 = 14 + 2x Step 3: 5x – 2x = 14 + 7 Step 4: 3x = 21 Step 5: x = 7 In which step did the student first make an error and what is the correct step? (5 points) Step 2; 6x – 12 = 14 + 2x Step 2; 6x – 7 = 2(6 + x + 4) Step 3; 5x – 2x = 14 – 7 Step 3; 5x + 2x = 14 + 7 11. Which statement is true about the equation z – z + 1 = z + 1? (5 points) It has no solution. It has one solution. It has two solutions. It has infinitely many solutions. 12. What is the solution to the equation 3.6m – 2.7 = –1.8m? (5 points) m = 0.25 m = 0.5 m = 1.25 m = 1.5