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Questions in mathematics

[Done] Which of the answer choices has matrix multiplication defined? [tex]\begin{array}{lccc} A & B & C & D \\ {\left[\begin{array}{l} 1 \\ 3 \\ 5 \end{array}\right]} & {\left[\begin{array}{lll} 1 & 2 & 7 \\ 6 & 8 & 0 \end{array}\right]} & {\left[\begin{array}{lll} 5 & 9 & 7 \end{array}\right]} & {\left[\begin{array}{ccc} -1 & 2 & 3 \\ 8 & -4 & 0 \\ 6 & 7 & 1 \end{array}\right]} \end{array}[/tex] A. AD B. DB C. AB

[Done] $\left[\begin{array}{cc}0 & 5 \\ -3 & 1 \\ -5 & 1\end{array}\right] \cdot\left[\begin{array}{cc}-4 & 4 \\ -2 & -4\end{array}\right]$

[Done] 7 = -6/5 * z - 23. Solve for z.

[Done] Select the correct answer. Which equation represents a circle with center $T(5,-1)$ and a radius of 16 units? A. $(x-5)^2+(y+1)^2=16$ B. $(x-5)^2+(y+1)^2=256$ C. $(x+5)^2+(y-1)^2=16$ D. $(x+5)^2+(y-1)^2=256

[Done] The volume of a rectangular prism box can be represented by the function [tex]$V(x)=2 x^3-5 x^2-3 x$[/tex]. If the height of the box is [tex]$x cm$[/tex], which of the following could represent the length and width of the container? A. [tex]$2 x+1$[/tex] and [tex]$x+3$[/tex] B. [tex]$2 x+1$[/tex] and [tex]$x-3$[/tex] C. [tex]$2 x-1$[/tex] and [tex]$x+3$[/tex] D. [tex]$2 x-1$[/tex] and [tex]$x-3$[/tex]

[Done] The power $3^{-3}$ equals $\frac{1}{27}$. Which expression is equivalent to $3^{-3}$? $\frac{1}{3^2}$ $\frac{1}{3^5}$ $\frac{1}{9^3}$ $\frac{1}{3^5}$

[Done] The graph of the function $f(x)=-(x+1)^2$ is shown. Use the dropdown menus to describe the key aspects of the function. The vertex is the $\square$ The function is positive $\square$ The function is decreasing $\square$ The domain of the function is $\square$ The range of the function is $\square$

[Done] Suppose you invest $[tex]$7000[/tex] in an account that earns [tex]$7 %[/tex] simple interest annually. Use this information to complete the table below. Round to the nearest cent as needed. | Year | Starting Balance | Interest | Ending Balance | |---|---|---|---| | 1 | $7000 | $490 | $7490 | | 2 | $7490 | $ | $ | | 3 | $ | $ | $8470 | | 4 | $8470 | $ | $ | | 5 | $ | $490 | $ |

[Done] Solve for $y$ in the proportion. $\frac{y}{3}=\frac{10.2}{9}$

[Done] Find the quotient of 1.25 divided by 0.25