Answer:
Step-by-step explanation:
Solve by Substitution :
// Solve equation [2] for the variable y
[2] y = -x + 5
// Plug this in for variable y in equation [1]
[1] x - 2•(-x +5) = 8
[1] 3x = 18
// Solve equation [1] for the variable x
[1] 3x = 18
[1] x = 6
// By now we know this much :
x = 6
y = -x+5
// Use the x value to solve for y
y = -(6)+5 = -1
Solution :
Answer:
(0,1508)
Step-by-step explanation:
If X is years, and (x,y) is the format, and no years have passed for the first census, then 0 fills in for X and the number of people fills in for y.
There is a preference when it comes to dogs but not cats
Since the required is the acceleration in the population, the second derivative of the equation is needed.
The first derivative has to be determined first.
dP(t)/dt = 10(0.5+3t^2)
Next, the second derivative can be determined using the first derivative:
d2P(t) = 10(6t) = 60t
Since it's acceleration, the unit is per year^2
THE ANSWER IS a) 60t people per year^2
I believe 156 because each person would have had to make 12 phone calls and there are 13 people so 12x13
