Given the matrices aa and bb shown below, find -a-\frac{1}{4}b.−a− 4 1 b. a=\begin{bmatrix} 0 & 3 \\ 2 & -1 \\ 0 & 3 \\ -5 & -2\end{bmatrix}\,\,\,\,b=\begin{bma trix} -28 & 8 \\ -4 & -8 \\ 20 & 40 \\ 0 & 48\end{bmatrix} a= ⎣ ⎢ ⎢ ⎡ 0 2 0 −5 3 −1 3 −2 ⎦ ⎥ ⎥ ⎤ b= ⎣ ⎢ ⎢ ⎡ −28 −4 20 0 8 −8 40 48 ⎦ ⎥ ⎥ ⎤

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Yuto solved the equation below. what is the solution to yuto’s equation?

Graph the function =gx+2x3 and give its domain and range using interval notation.