Let A=1-10212-111 A = \begin{bmatrix}1 & -1 & 0 \\2 & 1 &2 \\ -1 &1&1 \end{bmatrix} and define T:R3→R3 T : \mathbb R^3 \to \mathbb R^3 by T(x)=Ax T(\mathbf x) = A \mathbf x a.Find the image of 111 \begin{bmatrix}1\\ 1 \\ 1\end{bmatrix} under TT.b.Find all x∈R3 \mathbf x \in \mathbb R^3 such that T(x)=-387 T(\mathbf x) = \begin{bmatrix}-3\\ 8 \\ 7 \end{bmatrix}
Read DetailsDirections: One underlined phrase has an error. Find it and write the correction below. Historians are not sure why the city disappeared. Some think that was it destroyed by an earthquake. Others think that the people died of a disease.
Read DetailsDirections: One underlined phrase has an error. Find it and write the correction below. In the early 1900s, people believed that radioactive water was good for you. They thought that it will have healing properties if you drank it.
Read DetailsDirections: One underlined phrase has an error. Find it and write the correction below. Many rock formations in Joshua Tree National Park began forming about 100million years ago. The continuous movement of the Earth’s crust caused moltenliquid to oozing upward and cool while still below the Earth’s surface.
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