Answer:

Step-by-step explanation:
Given: 
To find: value of x and y
Solution:

From equation (i) and (ii),

Put
in (i)

Given that the value of the car is given by the function:
y=15000(1/5)^x
the graph will be represented as follows:
From the graph we see that the domain is all real numbers.
All you have to do is multiply 84 by 25%
And that's your answer.
I hope this helped
Answer:
B.
Mn = Mn-1 + 125 for n > 1 ; M1 = 3,875
Step-by-step explanation:
Since they tell us after 1970, the first data would be that of 1971 and also that if we started since 1970, we do not know the data of 1969, therefore answer B is correct.
Replacing:
Let M1 = 1971 then Mn-1, that is M0 = 1970, we know that the population of 1970 the population is 3750, because it would be 125 less than the subsequent year, and in 1975 there are 3875. Therefore:
in n = 1
M1 = M0 + 125
3875 = 3750 + 125
this gives an equality, thus fulfilling the equation.