Consider the following sets of vectors. Determine whether the sets are subspaces of R 3. If a set is a not a subspace, explain why. If a set is a subspace, give a basis and its dimension. A) S is the set of vectors of the form (a, 1, 3).
B) S is the set of vectors of the form (a, 0, 0).
C) S is the set of vectors of the form (2a, b, a 1)
D) S is the set of vectors of the form (2a, b 1, a).
E) S is the set of vectors of the form (a 2 , b2 , a2 b 2 ).

50- 250 is correct i did that one too

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

hello! just here for points! though i wish i knew!

3 3 6, because in every triangle the longer side is always shorter than the sum of the other two