Which is an advantage of roottop gardens over traditional gardens? A. better drainage C. more soil in which plants can spread out D. cooler growing season

points. 4. If \( u=3 i+6 j-7 k, v=4 i-5 j+6 k \) and \( w=-2 i+3 j-9 k \) then show that \( (u \times v) \bullet w=(v \times w) \bullet u=(w \times u) \bullet v \)

1. Two of the Eigen values of the matrix \( A=\left[\begin{array}{lll}2 & 2 & 1 \\ 1 & 3 & 1 \\ 1 & 2 & 2\end{array}\right] \) are equal to 1 each. Then solve the Eigen values of \( A^{-1} \).

Prove that for three sets \( \mathrm{A}, \mathrm{B} \) and C . \( (A \cap B)^{\prime}=A^{\prime} \cup B^{\prime} \) \( (A \cup B)^{\prime}=A^{\prime} \cap B^{\prime} \) Define Cartesian nroduct of two sets.

Which is an advantage of roottop gardens over traditional gardens? A. better drainage C. more soil in which plants can spread out D. cooler growing season

A computer technician charges a fixed amount for a repair, plus an additiona What is the meaning of the initial amount for the equation? A. It means the technician charges \( \$ 45 \) per hour for the repair. B. It means the technician charges a fixed amount of \( \$ 45 \) for the repair. C. It means the technician charges a fixed amount of \( \$ 75 \) for the repair, D. It means the technician charges \( \$ 75 \) per hour for the repair.