4. determine through justification whether s is a subspace of v for the following a) v=r^2, s = {(x, x): x € r) b) v= m_2(r, s = {2x2 orthogonal matrices}

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5

Lucy spent $165 in december using a new credit card. in january, she began paying between $15 and $25 each month towards her account balance.

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?