Step-by-step explanation:
Substitute n = 4 into the expression:
[tex]2(4)-7[/tex]
Solve:
[tex]8-7[/tex]
[tex]1[/tex]
Substitute n = 4 into the expression:
[tex]3(4)^{2} +2(4)-5[/tex]
Solve:
[tex]48+8-5[/tex]
[tex]56-5[/tex]
[tex]51[/tex]
Substitute n = 4 into the expression:
Is the expression [tex]-n^{3} ?[/tex]
[tex]-4^{3}[/tex]
Multiply:
[tex]-4 \times -4 \times -4= -64[/tex]
