For the following problem, set up the augmented matrix that describes the situation, and solve for the desired solution.
John has a jarful of quarters and nickels. There are 104 coins in the jar. The value of the coins is $16.60. How many of each type of coin are there?
Graph the inequality and show (shade in) solution region.
1. 2y ‹ -4
2. x+2y ›or equal to 6
3. -2y+4x‹ or equal to 8
Graph the system of inequalities. Show (by shading in) the feasible region.
1. -x-y ‹ 5, x ‹ 2y
2. 3x+y› or equal to 6, x+2y› or equal to 7, x› or equal to 0, y› or equal to 0