Chapter 10 - Section 10.9 - Systems of Inequalities - 10.9 Exercises - Page 764: 7

(1,2),(1,1) can be the solutions, (0,0), (3, 1) cannot be the solutions.

Substitute each set of coordinates into the system of inequalities to see whether it can be a solution. 1) $0\leq5$ $0\geq3 \rightarrow $ cannot be a solution 2) $-1\leq5$ $4\geq3 \rightarrow $ can be a solution 3) $1\leq5$ $3\geq3 \rightarrow $ can be a solution 4) $7\leq5 \rightarrow $ cannot be a solution