Answer:
Substitute 4 for z and solve
3(4^2)-10(4)-5
3(16)-40-5
48-40-5
8-5
3
3x²-10z-5
z= 4
3(4)²-10(4)-4
4⁴=16
3× 16-10(4)-5
3×16=48
48-10(4)-5
10(4)= 40
48-40=8
8-5= 3
