How do i solve 27=(1/3)^x/2

X+ y = k 2x + 3y = k + 1 the point of intersection of the lines has an x-coordinate of a.2k + 1 b.-2k + 1 c.2k - 1

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip