Answer:
Your answer should be C. 1/2(162 - 38)
Step-by-step explanation:
You would use distributive property 5x(2×+x)+50
Subtracting 
from both sides gives us the false statement 
so this equation can never be true and thus has no solutions.
Answer:
d
Step-by-step explanation:
Answer:
57
Step-by-step explanation:
Given that :
Standard deviation (σ) = 5 minutes = (5 *60) = 300 seconds
Margin of Error, E = 78
Assume a confidence interval of 95%;
Using the relation :
((Zα/2 * σ) / E)²
(1 - α)/2 = (1 - 0.95)/2 = 0.05 /2 = 0.025
Z0.025 = 1.96
Sample size = ((1.96 * 300) / 78)²
Sample size = (588 / 78)^2
Sample size = 7.5384615^2
Sample size = 56.828
= 57 samples
