Let hh be the set of all points in the second quadrant in the plane v=ℝ2v=r2. that is, h={(x, y)∣x≤0,y≥0}h={(x, y)∣x≤0,y≥0}. is hh a subspace of the vector space vv?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

Two sides of a right triangle measure 2 units and 4 units. what is the area of the square that shares a side with the third side of the triangle?