To find out if this ordered pair is a solution, we can plug the values in:
9(4) + 15(7) > 3
36 + 105 > 3
Now onto the next problem:
19(4) + 7 > 1
76 + 7 > 1
Because both of these equations are satisfied by the ordered pair, (4, 7) is a solution to this system of inequalities.