Answer:
4000000
Step-by-step explanation:
thats to the nearest million
3x-5y=4------eq1
4x+3y=15-------------eq2
multiply 3 to first eq and 5 to second eq.
9x-15y=12
20x+15y=75
subtract both eqs
29x=87 x=3 so put x in eq 1
3(3)-5y=4
5y=5
y=1
Answer:
here is the ratio 1 : 1.25 (sharks: dolphins)
Step-by-step explanation:
The general solutions always have some additive/multiplicative constant, that you must fix in the particular solution.
In order to do so, you need to impose that the particular solution passes through a certain point. In your case, you have

and you want

Put everything together, and you have

Since the cosine is zero in the chosen point. So, we've fixed the value of the constant, and the particular solution is found:

Answer:
D
Step-by-step explanation:
Exponential equation takes the form
where
a is the initial value ( a ≠ 0), and
b is the base ( b ≠ 1)
The equation given can be written as
. Thus, it is an exponential equation.
So a = 1 and b = 3.1
Thus we can say that the initial value = 1 and the base is 3.3