6×z-4 when z=4 i need on my math home work

Well, you would do 6x4 which equals 24. Then subtract 4 from that which leaves you with 20. So, the correct answer would be 20

6 × z -4        When z = 4

Solving:
6 × 4 - 4

Step one Remember the code in math:
PEMDAS

Step two Multiply:
6 × 4 - 4
    24 - 4

Step Three Subtract:
12 - 4
   20

20

Hope this helps!

Ithink it is 7. 16

Hnmmmn not sure