CPM Algebra 2

Find the vertex of the parabola.
f(x) = x² + 4x + 11

• (-2, -1)

• (2, 23)

• (-2, 7)

• (2, 7)

Solve using the quadratic formula.
6 - 4x + 3x² = 8

• ≈ 1.72 or –0.39

• ≈ 2.23 of -0.9

• No solution

• ≈ 1.72 of -0.9

Solve the inequality.
3(x + 4) > 12

• x > 3

• x < 0

• x > 0

• x < 3

12 - 3x > 2x + 1

• x > 11/5

• x < 11/5

• x > 11

• x < 11

The graph of the inequality
1/2x > 5 would have ________________.

• an open circle

• a closed circle

• no solution

• exactly one solution

Which inequality is represented in the graph?

• y > 4x - 2

• y < 4x - 2

• y > 1/4x - 2

• y < 1/4x - 2

Which point is in the solution set to the system of inequalities?

• (3, 5)

• (0, -1)

• (-2, 2)

• (0, -6)

Which system of equations represents the situation:
Katy weighs 105 pounds and is gaining 2 pounds a month. James weighs 175 pounds and is losing 3 pounds a month. (Let w = weight, m = number of months)

• w = 2m +105
  w = -3m +175

• w = 2m + 105
  w = 3m + 175

• 2m + 3w = 280
  m + w = -1

• Not enough information

What would be the first step to solve using the elimination method?
6x - 2y = -16
4x + y = 1

• Multiply the second equation by 2

• Multiply the second equation by -2

• Add the 2 equations together

• Subtract the 2 equations

Solve the system of equations using the elimination method.
y - x = 4
2y + x = 8

• (0, -4)

• (4, 8)

• (4, 0)

• (0, 4)