Lesson 15: Practice Problems

Problem 1

Solve:

Problem 2

Solve:

Problem 3

Which equation, together with , makes a system with one solution?

Problem 4

The system , has no solution.

  1. Change one constant or coefficient to make a new system with one solution.

  2. Change one constant or coefficient to make a new system with an infinite number of solutions.

Problem 5

Match each graph to its equation.

Four graphs, A-D. A and B are positive slopes. C and D are negative slopes. Y-intercepts: A (0,3), B (0,-3) C (0,3) D (0,-3)
  1. Graph A

  2. Graph B

  3. Graph C

  4. Graph D

Problem 6

Here are two points: , . What is the slope of the line between them?