It is A because if you subtract 9 and 6 you get 3 and then you add the 4 and get 7
4-9= -5 that is the answer
The square (call it
) has one vertex at the origin (0, 0, 0) and one edge on the y-axis, which tells us another vertex is (0, 3, 0). The normal vector to the plane is
, which is enough information to figure out the equation of the plane containing
:

We can parameterize this surface by

for
and
. Then the flux of
, assumed to be
,
is



Answer:
1=b. 2=a
Step-by-step explanation:
Since there are corresponding angles, 1 and b will be congruent, and 2 and a will be congruent.