Answer:
1. -3
2. 7
3. -143
Step-by-step explanation:
you just plug the number in parentheses as x
1. -11(1^2)-5(1)+13= -3
2. -11(-1^2)-5(-1)+13= 7
3. -11(-4^2)-5(-4)+13= -143
B: (x-6)^2=0
2 hours each to make 4 hours in total