For margin of error to be a maximum of 3:
3 = z*(SD / sqrt(n)), where z is the z-score, SD is the standard deviation and n is the sample size.
z = 1.96 for a 95% confidence interval, and we are given SD = 15.
3 = 1.96*15/sqrt(n)
sqrt(n) = 9.8
n = 96.04 ~ 96 commercials.
Answer:
Step-by-step explanation:
y + 4 = -6(x - 7)
y + 4 = -6x + 42
y = -6x + 38
Answer:
-14x+1
Step-by-step explanation:
-6x-8
-8x+9
-14x+1
To get x by itself, you would add 13 to both sides. x=115
2x+10 is less than or equal to 20
the domain is 0, 1, 2, 3, 4, 5.
