Answer:
x-9
Step-by-step explanation:
-3(x+3)+4x
-3x-9+4x
-3x+4x-9
x-9
Well on the second picture your answer is A
2. is B
is a slightly more compact way of saying
. So

Answer:
there is no common difference. it is not constant.
Answer:
A) 1,492
B) 1,908
Step-by-step explanation:
A) The equation set up for this part is 1,542-50=1,492 We know that we're subtracting 50 from 1,542 because it say that the plane starts below sea level.
B) The equation set up for this part is 3,400-1,492=1,908 We know that we're subtracting the answer from part A from 3,400 because the plane will need to climb the difference in order to reach 3,400.