Use the variation of parameters formula to find the general solution of the system x' (t) = ax(t) +f(t), where a and f(t) are given:
a = [ 8 -4 ] f(t) = [ t^-2 / 2 ]
[ 4 -2 ] [ t^-2 ]
fyi: a and f(t) are both matrices

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Daryl factors the polynomial p(x)=x3+x2−26x+24 to rewrite it as p(x)=(x+6)(x−4)(x−1). which equations must be true? there may be more than one correct answer. select all correct answers. p(1)=0 p(−4)=0 p(−1)=0 p(6)=0 p(4)=0 p(−6)=0

What is the sum of these mixed numbers 4 2/3+ 3 1/9