Which expressions, when evaluated with z = 8, are negative in value?
choose all answers that are correct.
a.
–2z – 14
b.
–25 + 4z
c.
–2z + 15
d.
30 – 3z

To find out which equation is negative when you plug in z=8, then plug it in and find out! :D

A) –2z – 14 = -2(8)-14 = -16-14 = -30

-2x-14 is negative when z = 8. So A is one possible answer :)

B) –25 + 4z = -25 + 4(8) = -25 + 32 = 7

7 is positive when z = 8, so B is not a correct answer.

C) –2z + 15 = -2(8) + 15 = -16 + 15 = -1

-1 is negative when z  8, So C is another correct answer choice.

D) 30 – 3z = 30 - 3(8) = 30 - 24 = 6

6 is positive when z=8, So D is not a correct answer.

To summarize, your answer would be A and C.