Question

Someone help me................

Answer 1

alright i think it is 6.8

Answer 2

`-z^(2) =-25`

Explanation:

The value of z is given as
`-5`

The expression is given as
`-z^(2)`

Substitute the value of z in the expression:

`=-(-5)^(2)` {add the value inside the bracket to avoid mistakes}

`=-1` ×
`(-5)^(2)`

`=-1` ×
`((-5)` ×
`(-5))`

`=-25`