Answer:

Step-by-step explanation:
It is a linear homogeneous differential equation with constant coefficients:
y" + 4y = 0
Its characteristic equation:
r^2+4=0
r1=2i
r2=-2i
We use these roots in order to find the general solution:

Answer:
the Answer is -4
Step-by-step explanation:
since you add 15 to -19 you get -4
1.27 = 1 27/100
I hope this helps!
Answer:
The population in the study is the entire set of high school students in the United States
Step-by-step explanation:
The goal of the study is to study the texting habits of hogh school students
Answer:
1060
Step-by-step explanation:
1060