1. Divide by 4
sqrt 2x+8 = 6
2. Square both sides to remove square root
2x+8 = 36
3. Subtract 8
2x = 28
4. Divide by 2 to make x by itself
x = 14
Answer:
6s(5k+3)
Step-by-step explanation:
18s+30sk
Factor out 6.
6(3s+5sk)
Consider 3s+5sk. Factor out s.
s(3+5k)
Rewrite the complete factored expression.
6s(5k+3)
Answer:
B
Step-by-step explanation:
Standard deviation is the average distance away from the mean, thus B is correct
Take the homogeneous part and find the roots to the characteristic equation:

This means the characteristic solution is

.
Since the characteristic solution already contains both functions on the RHS of the ODE, you could try finding a solution via the method of undetermined coefficients of the form

. Finding the second derivative involves quite a few applications of the product rule, so I'll resort to a different method via variation of parameters.
With

and

, you're looking for a particular solution of the form

. The functions

satisfy


where

is the Wronskian determinant of the two characteristic solutions.

So you have




So you end up with a solution

but since

is already accounted for in the characteristic solution, the particular solution is then

so that the general solution is