Question

If z(t) = 2t2 + 7t – 4, find z(–2) and z(7).

A. z(–2) = –26; z(7) = 143
B. z(–2) = –10; z(7) = 143
C. z(–2) = 11; z(7) = 101
D. z(–2) = –2; z(7) = 241

Answer 1

Answer:

B. z(–2) = –10; z(7) = 143

Step-by-step explanation:

Plug in -2 for t

$z(-2)=2(-2)^{2} +7(-2)-4\\=-10$

Plug in 7 for t

$z(7)=2(7)^{2} +7(7)-4\\=143$