Find a basis for each of these subspaces of r4 :
a) all vectors whose components are equal.
b) all vectors whose components adds to zero.
c) all vectors that are perpendicular to (1,1,0,0) and(1,0,1,1)
d) the column space(in r2) and nullspace (in r5) of u= [ (1 0 1 01); (0 1 0 1 0)]

The answer is $9.90 with rounding to the nearest tenth

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !

Ibelieve that the answer is 1 but i could be wrong