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# HELP ASAP PLEEASSE!!!

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Let $$\mathbf{A}$$ be a matrix such that $$\mathbf{A}^{-1} = \begin{pmatrix} 1 & 1 \\ 2 & x \end{pmatrix}$$ for some value of $$x$$. What is the vector that $$\mathbf{A}$$ maps to $$\begin{pmatrix} 1 \\ 0 \end{pmatrix}?$$

Oct 13, 2019

The answer is $$\begin{pmatrix} 3 \\ -7 \end{pmatrix}$$.