1. Quarter 1 Review Hot Seat

2. Rules 1.You will work in groups of three. Each member is responsible for a copy of the work for this activity in their binder. 2. Each question is worth one point. 3. I will randomly select one member from each team to present the answer for their group. If that person is correct, their group will receive a point; if not, their group will not receive a point for the question.

3. Perform the operation

4. Multiply the matrices if possible. If not state why

5. Find the determinant of the matrix

6. Find the inverse of the matrix if possible. If not state why

7. Solve the system of equations using Cramer’s Rule or inverse matrices

8. Write the function represented by the graph

9. Write the inequality represented by the graph

10. Write the function represented by the graph

12. Write an equation for the piecewise function shown

13. Overtime Due to the high prices of gold right now, many jewelers are mixing gold and silver in their jewelry. Gold weighs 10 ounces per cubic inch and silver weighs 4 ounces per cubic inch. At Jared’s the Galleria of Jewelry they create necklaces that weigh no more than 48 ounces and have a volume limit of 6 cubic inches. a. Determine the inequalities that define the feasible region b. Use Cramer’s Rule or inverse matrices to find the point of intersection. Explain what this point means in the context of the situation presented. c. Find all the corner points of the feasible region d.Sketch the graph. Be sure to label all key points with their coordinates and the axes with what they represent in the context.