Determine whether each of the following sets are subspaces of r3 under the operations of addition and scalar multiplication defined on r3. justify your answers
w1={(a1,a2,a3)∈r3: a1=3a2 and a3=−a2}

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Find the difference (8ab+a+2) - (3ab+6)

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%