Answer:
12x - 9y
Step-by-step explanation:
According to the distributive property:
3(4x - 3y) =
3*4x - 3*3y =
12x - 9y you can't subtract different variables so multiply by them both by the left over constant and get the expression of 12x - 9y
the population is everyone at the airport ,the sample is the 50 people that walked by Elizabeth
the answer is the 2nd one (3x-1) and (x+4)
