Answer:
Yes is a solution
Step-by-step explanation:
3h = 2(h+2)-1
We replace h=3
3*3 = 2(3+2) - 1
Solve
9 = 2(5)-1
9 = 10 - 1
9 = 9
Is correct h= 3
when we manage to find the same value on both sides of equality it means that the value entered is a possible option
Answer:
The sample size required is 2500.
Step-by-step explanation:
z-score:
In function of the margin of error M, the z-score is given by:

In this question, we have that:

So






The sample size required is 2500.
Answer:4x2−6x−4
Step-by-step explanation:
(4x+2)(x−2)
=(4x+2)(x+−2)
=(4x)(x)+(4x)(−2)+(2)(x)+(2)(−2)
=4x2−8x+2x−4
=4x2−6x−4