Answer:
x= 4
Step-by-step explanation:
4 x 4= 16
Multiply the first digit by 3 then subtract the answer by 2. Rule: x 3 - 2
Answer:
x=1
y=-4
Step-by-step explanation:
Since -x-3=y subsitue that in at the top equation




Plug x=1 back into the equation to solve for y.


Answer:

Step-by-step explanation:
Using the formula for the exponential decay that is
, we have N=
,
and k=0.1374.
Thus,
becomes



Taking log on both sides, we get



