Question

The displacement x of a particle is dependent on
timet according to the relation : x = 3-5t + 2t. Ift
is measured in seconds and x in metres, find its
(1) velocity at t = 2s and (ii) acceleration at t = 4s.​

Answer 1

x=3-5t+2t

x=3-3t

dx/dt=-3

v=-3m/s constant

a=0

please clear if is 2t or t$t^{2}$