Answer: y = 1/3x + 28
Step-by-step explanation:
Separating variables, we have

Integrate both sides.


Given that
, we find

Then the particular solution is



and because
, we take the negative solution to accommodate this initial value.

Let y directly proportional to X
thus y = CX
where c is proportionality constant
given c= 9
thus y = 9x
Answer:
$180
Step-by-step explanation:
step one 86+4 =90
step two 90×2=180